Today is April 30th. It's the 121st day of the year. 245 days remain. It's week 18 of the year.
Unless
noted, the following data is based upon observations collected by the
National Weather Service, Chicago, at O'Hare International Airport
(ORD) between November 1978 and last year. ORD has been the official
site of record for Chicago since Thursday, January 17, 1980. Before
this, the official site of record was on the
south side of Chicago at Midway
International Airport (MDW), beginning on Wednesday,
July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was
at various locations in Chicago going back to
Monday, October 16, 1871. Observations taken from
October 15, 1870 to October 8, 1871 were lost in
the Great Chicago Fire.
According
to the National Climatic Data Center (NCDC), the normal high is 65
and the normal low is 44. I've calculated the 33-year averages at 63
and 43.
On
the warm side, two years ago, in 2010 (O'Hare's warmest April 30th), the high was 81 with a low of 62.
In 2001 (O'Hare's third warmest April 30th) the high was 85 (O'Hare's warmest high of the date) with a low of 50, a 35 degree spread. The other warm low was
57 in 1986. The record high of 91 and
record warmest low of 68 were set on the same hot day in 1942 at the University of Chicago. 26
of the past 33 highs (79%) were in the: 50s (10) and 60s (16). O'Hare recorded consecutive highs in the 50s & 60s as follows: eight from 1986 through 1993 (of which, seven of them, or 88% were 60s) and eight from 2002 through 2009. On the
warm side, five highs (15%) were in the: 70s (3) and 80s (2). O'Hare's second warmest April 30th was in 1970 as the high was 71 with a low of 66 (O'Hare's warmest low of the date). O'Hare's fourth warmest April 30th was in 1962 as the high was 84 with a low of 49. That high of 84 was the warmest for many years, having been eclipsed in 2001. On the cold
side, two highs (6%) were in the 40s.
In
looking back through the years to the first April at O'Hare in 1959,
the following instances were notable: in 1978 the high was a cold 48
with a low of 35, a cold day. In 1977 the high was 71 with a low of 39,
a 32 degree spread. In 1970 the high was 71 with a warm low of 66, a
five degree spread and warm day. In 1968 the high was 72 with a low of
42, a 30 degree spread. In 1964 the high was a cold 49 with a low of
45, a four degree spread. In 1963 the high was a cold 51 with a low of 34, a cold day. In
1962 the high was a warm 84 with a low of 49, a 35 degree spread and
warm day. In 1961 the high was 67 with a low of 36, a 31 degree
spread.
More recently, we had a small spread of seven degrees
in 2006 (59/52). The additional large spreads were 35 degrees in 1985 (75/40), 34
degrees in 2000 (71/37) and 31 degrees in 1988 (69/38).
On the
cold side, in 1994 (O'Hare's coldest April 30th) the high was 43 (O'Hare's coldest high of the date) with a low of 34. In 1979 the high
was 47 with a low of 35. The other cool highs were 50 in 1995, 52 a
year later in 1996 and 53 in 1987. The record low of 30 was set way back in 1873. In 2008 the low was a near-record 31 degrees (O'Hare's coldest low of the date). O'Hare had another cold low of 32 degrees in 1969. The
record coldest high of 39 occurred way back in 1907. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 25 of the last 33
lows (76%) were in the: 30s (12) and 40s (13). O'Hare recorded consecutive 30s & 40s lows as follows: ten from 1976 through 1985 and six from 1992 through 1997. Eight lows (24%) were
in the warm: 50s (7) and 60s (1). O'Hare's only 60s lows of the date were 66 in 1970 and 62 in 2010.
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 5:19 and
sunrise is
at 5:49.
Sunset is at
19:52
and
twilight
ends at 20:23.
There's
a total
of 14 hours, 3 minutes of
daylight
today
and 15
hours, 4
minutes between
twilights.
We gained three minutes of
daylight from
yesterday. Tomorrow
twilight
begins
at 5:18 and sunrise
is at 5:48.
The
moon is waxing gibbous, having reached first quarter yesterday at 4:57.
Illumination
was 59% at
midnight, will be 64% at noon
and 69% at
midnight
tonight.
Moonset is at 2:21 this morning. Moonrise is at 13:42 this afternoon. Moonset is at 2:51 tomorrow morning. Moonlight
time is 12 hours, 39 minutes which is 35 minutes
shorter than yesterday.
Spring
began on March 12th and runs
for 84
days
through June 3rd. Warm Spring began on April 13th and
runs for 52
days through June 3rd. High
temperatures
in
this
period
are
usually in
the 50s, 60s and
70s.
Highs in
the 80s and 90s occur
infrequently. May Day is tomorrow. Mother's Day is in 13 days.
Monday, April 30, 2012
April 29: ORD
Today is April 29th. It's the 120th day of the year. 246 days remain. It's week 18 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 64 and 43.
On the warm side, in 2004 (O'Hare's second warmest April 29th) the high was 78 with a low of 59. In 1987 the high was 83 with a low of 45, a 38 degree spread. The other warm highs were 82 in 2007 and 79 two years ago, in 2010. The record-tying high of 88 and record warmest low of 68 were set on the same hot day at Midway in 1970. The co-record high of 88 was first set way back in 1899. 28 of the past 33 highs (85%) were in the: 50s (8), 60s (12) and 70s (8). On the warm side, two highs were in the 80s. O'Hare's warmest April 29th was in 1970 as the high was 86 (O'Hare's warmest high of the date) with a low of 69 (O'Hare's warmest low of the date). The only other 60s low was 60 in 1974. On the cold side, three highs were in the 40s. We've seen all five categories of highs the past five years: 62 last year, 79 in 2010, 55 in 2009, 44 in 2008 and 82 in 2007.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 70 with a low of 40, a 30 degree spread. In 1977 the high was 64 with a cold low of 30, a 34 degree spread. That low of 30 was lower than the record low. In 1975 the high was a warm 76 with a low of 39, a 37 degree spread. In 1974 the low was a warm 60 degrees. In 1971 the high was a cold 51degrees. In 1970 the high was 86 with a low of 69, a hot day (the day of the record high of 88 and record warmest low of 68 at Midway). In 1969 the high was a cold 51 with a low of 33, a cold day. In 1966 the high was 67 with a low of 36, a 31 degree spread. In 1965 the high was 70 with a low of 35, a 35 degree spread. In 1961 the low was a cold 30 degrees (lower than the record low).
More recently, we had additional large spreads of 37 degrees in 2007 (82/45), 33 degrees in 1985 (69/36), 33 degrees two years ago, in 2010 (79/46), 32 degrees in 1988 (65/33) and 31 degrees in 1986 (74/43). There have been no small spreads of up to seven degrees in O'Hare's history on April 29th.
On the cold side, in 2008 (O'Hare's coldest April 29th) the high was 44 (O'Hare's coldest high of the date) with the record-tying low of 31. In 1996 the high was 45 with a low of 36. In 1979 the high was 48 with a low of 37. The co-record low of 31 occurred in 1958 at Midway. O'Hare had lows of 30 degrees in both 1977 and 1961 but in these years O'Hare was not the official station of record for Chicago. The record coldest high of 39 was set way back in 1893, at a time when the official readings were taken adjacent to Lake Michigan. 21 of the last 33 lows (64%) were in the 40s. O'Hare recorded seven consecutive 40s lows from 1997 through 2003. Nine lows (27%) were in the cold 30s. Three lows (9%) were in the warm 50s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:20 and sunrise is at 5:51. Sunset is at 19:51 and twilight ends at 20:22. There's a total of 14 hours of daylight today and 15 hours, 2 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:19 and sunrise is at 5:49. The moon is reaches first quarter today at 4:57. Illumination was 48% at midnight, will be 54% at noon and 59% at midnight tonight. Moonset is at 1:50 this morning. Moonrise is at 12:36 this afternoon. Moonset is at 2:21 tomorrow morning. Moonlight time is 13 hours, 14 minutes which is 29 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. May Day is in two days. Mother's Day is in 14 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 64 and 43.
On the warm side, in 2004 (O'Hare's second warmest April 29th) the high was 78 with a low of 59. In 1987 the high was 83 with a low of 45, a 38 degree spread. The other warm highs were 82 in 2007 and 79 two years ago, in 2010. The record-tying high of 88 and record warmest low of 68 were set on the same hot day at Midway in 1970. The co-record high of 88 was first set way back in 1899. 28 of the past 33 highs (85%) were in the: 50s (8), 60s (12) and 70s (8). On the warm side, two highs were in the 80s. O'Hare's warmest April 29th was in 1970 as the high was 86 (O'Hare's warmest high of the date) with a low of 69 (O'Hare's warmest low of the date). The only other 60s low was 60 in 1974. On the cold side, three highs were in the 40s. We've seen all five categories of highs the past five years: 62 last year, 79 in 2010, 55 in 2009, 44 in 2008 and 82 in 2007.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 70 with a low of 40, a 30 degree spread. In 1977 the high was 64 with a cold low of 30, a 34 degree spread. That low of 30 was lower than the record low. In 1975 the high was a warm 76 with a low of 39, a 37 degree spread. In 1974 the low was a warm 60 degrees. In 1971 the high was a cold 51degrees. In 1970 the high was 86 with a low of 69, a hot day (the day of the record high of 88 and record warmest low of 68 at Midway). In 1969 the high was a cold 51 with a low of 33, a cold day. In 1966 the high was 67 with a low of 36, a 31 degree spread. In 1965 the high was 70 with a low of 35, a 35 degree spread. In 1961 the low was a cold 30 degrees (lower than the record low).
More recently, we had additional large spreads of 37 degrees in 2007 (82/45), 33 degrees in 1985 (69/36), 33 degrees two years ago, in 2010 (79/46), 32 degrees in 1988 (65/33) and 31 degrees in 1986 (74/43). There have been no small spreads of up to seven degrees in O'Hare's history on April 29th.
On the cold side, in 2008 (O'Hare's coldest April 29th) the high was 44 (O'Hare's coldest high of the date) with the record-tying low of 31. In 1996 the high was 45 with a low of 36. In 1979 the high was 48 with a low of 37. The co-record low of 31 occurred in 1958 at Midway. O'Hare had lows of 30 degrees in both 1977 and 1961 but in these years O'Hare was not the official station of record for Chicago. The record coldest high of 39 was set way back in 1893, at a time when the official readings were taken adjacent to Lake Michigan. 21 of the last 33 lows (64%) were in the 40s. O'Hare recorded seven consecutive 40s lows from 1997 through 2003. Nine lows (27%) were in the cold 30s. Three lows (9%) were in the warm 50s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:20 and sunrise is at 5:51. Sunset is at 19:51 and twilight ends at 20:22. There's a total of 14 hours of daylight today and 15 hours, 2 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:19 and sunrise is at 5:49. The moon is reaches first quarter today at 4:57. Illumination was 48% at midnight, will be 54% at noon and 59% at midnight tonight. Moonset is at 1:50 this morning. Moonrise is at 12:36 this afternoon. Moonset is at 2:21 tomorrow morning. Moonlight time is 13 hours, 14 minutes which is 29 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. May Day is in two days. Mother's Day is in 14 days.
Saturday, April 28, 2012
April 28: ORD
Today is April 28th. It's the 119th day of the year. 247 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 62 and 40.
On the warm side, in 2003 the high was 77 with a low of 54. In 1993 the high was 73 with a low of 55. The other warm high was 79 in 2004. The record high of 86 was set way back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. The record warmest low of 66 occurred in 1974 at Midway. Another warm low was 63 in 1914. 13 of the past 33 highs (39%) were in the 50s. On the warm side, 17 highs (52%) were in the: 60s (8) and 70s (9). There have been no highs of 80 or higher on this date in O'Hare's history. The warmest highs were 79 degrees, in 1970 and 2004. 1974 was O'Hare's warmest April 28th as the high was 76 with the warmest low of the date, 64 degrees. The second warmest (by just half a degree) was in 1970 with a high of 79 and low of 60. These two 60s lows are the only lows in the 60s for the date. On the cold side, three highs (9%) were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 71 with a low of 37, a 34 degree spread. In 1977 the high was a cold 47 with a low of 32, a cold day. In 1974 the high was 76 with a low of 64, a warm day and day of the record warmest low of 66 at Midway. In 1971 the high was a cold 49 with a low of 42, a seven degree spread. In 1970 the high was 79 with a low of 60, a warm day. In 1968 the high was 69 with a low of 36, a 33 degree spread. In 1967 the high was 62 with a cold low of 30, a 32 degree spread. In 1962 the high was 72 with a low of 41, a 31 degree spread.
More recently, we had an additional small spread of four degrees in 1980 (46/42). We had large spreads of 34 degrees in 2007 (73/39), 33 degrees in 2000 (70/37), 31 degrees in 1981 (73/42), 31 degrees in 1992 (59/28), 31 degrees in 1997 (66/35), 31 degrees in 2004 (79/48), 31 degrees in 2006 (68/37) and 31 degrees two years ago in 2010 (64/33).
On the cold side, in 2008 (O'Hare's second coldest April 28th) the high was 46 with a low of 35. Last year, in 2011, the high was 45 (O'Hare's coldest high of the date) with a low of 40, a five degree spread. The other cold lows were the record low of 28 in 1992 and 31 in 1982. The other cold highs were 46 in 1980, 50 in 1979, 50 in 1996, 51 in 1994 and 51 three years ago in 2009. The record coldest high of 39 occurred way back in 1874, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 30s (14) and 40s (15). One low was in the cold 20s (the record low). Three lows were in the warm 50s. O'Hare's coldest April 28th was in 1977 as the high was 47 with a low of 32. O'Hare also had a cold low of 30 in 1967.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:22 and sunrise is at 5:52. Sunset is at 19:50 and twilight ends at 20:20. There's a total of 13 hours, 58 minutes of daylight today and 14 hours, 58 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:20 and sunrise is at 5:51. The moon is waxing crescent, heading towards first quarter tomorrow at 4:57. Illumination was 38% at midnight, will be 43% at noon and 48% at midnight tonight. Moonset is at 1:15 this morning. Moonrise is at 11:32 this morning. Moonset is at 1:50 tomorrow morning. Moonlight time is 13 hours, 43 minutes which is 25 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. May Day is in three days. Mother's Day is in 15 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 62 and 40.
On the warm side, in 2003 the high was 77 with a low of 54. In 1993 the high was 73 with a low of 55. The other warm high was 79 in 2004. The record high of 86 was set way back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. The record warmest low of 66 occurred in 1974 at Midway. Another warm low was 63 in 1914. 13 of the past 33 highs (39%) were in the 50s. On the warm side, 17 highs (52%) were in the: 60s (8) and 70s (9). There have been no highs of 80 or higher on this date in O'Hare's history. The warmest highs were 79 degrees, in 1970 and 2004. 1974 was O'Hare's warmest April 28th as the high was 76 with the warmest low of the date, 64 degrees. The second warmest (by just half a degree) was in 1970 with a high of 79 and low of 60. These two 60s lows are the only lows in the 60s for the date. On the cold side, three highs (9%) were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 71 with a low of 37, a 34 degree spread. In 1977 the high was a cold 47 with a low of 32, a cold day. In 1974 the high was 76 with a low of 64, a warm day and day of the record warmest low of 66 at Midway. In 1971 the high was a cold 49 with a low of 42, a seven degree spread. In 1970 the high was 79 with a low of 60, a warm day. In 1968 the high was 69 with a low of 36, a 33 degree spread. In 1967 the high was 62 with a cold low of 30, a 32 degree spread. In 1962 the high was 72 with a low of 41, a 31 degree spread.
More recently, we had an additional small spread of four degrees in 1980 (46/42). We had large spreads of 34 degrees in 2007 (73/39), 33 degrees in 2000 (70/37), 31 degrees in 1981 (73/42), 31 degrees in 1992 (59/28), 31 degrees in 1997 (66/35), 31 degrees in 2004 (79/48), 31 degrees in 2006 (68/37) and 31 degrees two years ago in 2010 (64/33).
On the cold side, in 2008 (O'Hare's second coldest April 28th) the high was 46 with a low of 35. Last year, in 2011, the high was 45 (O'Hare's coldest high of the date) with a low of 40, a five degree spread. The other cold lows were the record low of 28 in 1992 and 31 in 1982. The other cold highs were 46 in 1980, 50 in 1979, 50 in 1996, 51 in 1994 and 51 three years ago in 2009. The record coldest high of 39 occurred way back in 1874, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 30s (14) and 40s (15). One low was in the cold 20s (the record low). Three lows were in the warm 50s. O'Hare's coldest April 28th was in 1977 as the high was 47 with a low of 32. O'Hare also had a cold low of 30 in 1967.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:22 and sunrise is at 5:52. Sunset is at 19:50 and twilight ends at 20:20. There's a total of 13 hours, 58 minutes of daylight today and 14 hours, 58 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:20 and sunrise is at 5:51. The moon is waxing crescent, heading towards first quarter tomorrow at 4:57. Illumination was 38% at midnight, will be 43% at noon and 48% at midnight tonight. Moonset is at 1:15 this morning. Moonrise is at 11:32 this morning. Moonset is at 1:50 tomorrow morning. Moonlight time is 13 hours, 43 minutes which is 25 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. May Day is in three days. Mother's Day is in 15 days.
Friday, April 27, 2012
April 27: ORD
Today is April 27th. It's the 118th day of the year. 248 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 61 and 42.
On the warm side, in 1986 (O'Hare's second warmest April 27th) the high was the record high of 87 with a low of 61. Four years later, in 1990, the high was 84 with a low of 62. In 1984 the high was 80 with a low of 56. In 1991 the high was 71 with a low of 58. The other warm highs were 79 in 1981 and 75 in 2003. The record warmest low of 67 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 13 of the past 33 highs (40%) were in the 50s. 12 highs (36%) were in the: 60s (6) and 70s (6). Our most recent 60s high was 63 in 2001. There's a fight for the middle ground of sorts: 50s versus 60s & 70s. On the cold side, five highs (15%) were in the 40s. On the warm side, three highs (9%) were in the 80s. O'Hare's warmest April 27th was in 1962 as the high was 84 with O'Hare's warmest low of the date, 66 degrees. The other pre-1979 80s highs were 82 in 1974 and 81 in 1977.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 66 with a low of 35, a 31 degree spread. In 1977 the high was a warm 81 with a low of 44, a 37 degree spread. In 1976 the high was a cold 49 with a low of 32, a cold day. In 1974 the high was 82 with a low of 55, a warm day. In 1971 the high was a cold 48 degrees. In 1970 the high was 77 with a low of 60, a warm day. In 1969 the low was a warm 55 degrees. In 1966 the high was a cold 43 with a low of 37, a six degree spread and cold day. In 1965 the high was 63 with a low of 32, a 31 degree spread. In 1964 the high was 63 with a warm low of 58, a five degree spread. In 1962 the high was 84 with a low of 66, a warm day. In 1959 the high was a cold 47 with a low of 40, a seven degree spread.
More recently, we had additional small spreads of five degrees in 1980 (45/40) and seven degrees in 1999 (53/46). We had large spreads of 40 degrees in 1981 (79/39), 39 degrees in 2003 (75/36), 33 degrees in 2006 (71/38), 32 degrees in 1993 (66/34), 32 degrees in 1994 (69/37) and 30 degrees in 2000 (68/38).
On the cold side, 1988 and 1992 are tied as O'Hare's coldest April 27th days. In 1988 the high was 42 (O'Hare's coldest high of the date) with a low of 36, a six degree spread. Four years later, in 1992, the high was 47 (our most recent 40s high) with a low of 31 (O'Hare's coldest low of the date). The other cold highs were 45 in 1980, 47 in 1979, 48 in 1985 and 51 two years ago, in 2010. The record low of 29 was set in 1945 at Midway. The record coldest high of 39 occurred in 1934 at the University of Chicago. 28 of the last 33 lows (85%) were in the: 30s (17) and 40s (11). O'Hare recorded 17 consecutive lows in the 30s & 40s from 1992 through 2008. O'Hare had lows of 32 degrees in 1965, 1976 and 1996. Five lows were in the warm: 50s (3) and 60s (2).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1991 the high was 71 with a low of 58, overall 11.5 degrees ABOVE normal. Then in 1992 the high was 47 with a low of 31, overall 14 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:23 and sunrise is at 5:54. Sunset is at 19:49 and twilight ends at 20:19. There's a total of 13 hours, 55 minutes of daylight today and 14 hours, 56 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:22 and sunrise is at 5:52. The moon is waxing crescent, heading towards first quarter in two days at 4:57. Illumination was 29% at midnight, will be 34% at noon and 38% at midnight tonight. Moonset was at 0:38 this morning. Moonrise is at 10:30 this morning. Moonset is at 1:15 tomorrow morning. Moonlight time is 14 hours, 8 minutes which is 20 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is today. May Day is in four days. Mother's Day is in 16 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 64 and the normal low is 43. I've calculated the 33-year averages at 61 and 42.
On the warm side, in 1986 (O'Hare's second warmest April 27th) the high was the record high of 87 with a low of 61. Four years later, in 1990, the high was 84 with a low of 62. In 1984 the high was 80 with a low of 56. In 1991 the high was 71 with a low of 58. The other warm highs were 79 in 1981 and 75 in 2003. The record warmest low of 67 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 13 of the past 33 highs (40%) were in the 50s. 12 highs (36%) were in the: 60s (6) and 70s (6). Our most recent 60s high was 63 in 2001. There's a fight for the middle ground of sorts: 50s versus 60s & 70s. On the cold side, five highs (15%) were in the 40s. On the warm side, three highs (9%) were in the 80s. O'Hare's warmest April 27th was in 1962 as the high was 84 with O'Hare's warmest low of the date, 66 degrees. The other pre-1979 80s highs were 82 in 1974 and 81 in 1977.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1978 the high was 66 with a low of 35, a 31 degree spread. In 1977 the high was a warm 81 with a low of 44, a 37 degree spread. In 1976 the high was a cold 49 with a low of 32, a cold day. In 1974 the high was 82 with a low of 55, a warm day. In 1971 the high was a cold 48 degrees. In 1970 the high was 77 with a low of 60, a warm day. In 1969 the low was a warm 55 degrees. In 1966 the high was a cold 43 with a low of 37, a six degree spread and cold day. In 1965 the high was 63 with a low of 32, a 31 degree spread. In 1964 the high was 63 with a warm low of 58, a five degree spread. In 1962 the high was 84 with a low of 66, a warm day. In 1959 the high was a cold 47 with a low of 40, a seven degree spread.
More recently, we had additional small spreads of five degrees in 1980 (45/40) and seven degrees in 1999 (53/46). We had large spreads of 40 degrees in 1981 (79/39), 39 degrees in 2003 (75/36), 33 degrees in 2006 (71/38), 32 degrees in 1993 (66/34), 32 degrees in 1994 (69/37) and 30 degrees in 2000 (68/38).
On the cold side, 1988 and 1992 are tied as O'Hare's coldest April 27th days. In 1988 the high was 42 (O'Hare's coldest high of the date) with a low of 36, a six degree spread. Four years later, in 1992, the high was 47 (our most recent 40s high) with a low of 31 (O'Hare's coldest low of the date). The other cold highs were 45 in 1980, 47 in 1979, 48 in 1985 and 51 two years ago, in 2010. The record low of 29 was set in 1945 at Midway. The record coldest high of 39 occurred in 1934 at the University of Chicago. 28 of the last 33 lows (85%) were in the: 30s (17) and 40s (11). O'Hare recorded 17 consecutive lows in the 30s & 40s from 1992 through 2008. O'Hare had lows of 32 degrees in 1965, 1976 and 1996. Five lows were in the warm: 50s (3) and 60s (2).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1991 the high was 71 with a low of 58, overall 11.5 degrees ABOVE normal. Then in 1992 the high was 47 with a low of 31, overall 14 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:23 and sunrise is at 5:54. Sunset is at 19:49 and twilight ends at 20:19. There's a total of 13 hours, 55 minutes of daylight today and 14 hours, 56 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:22 and sunrise is at 5:52. The moon is waxing crescent, heading towards first quarter in two days at 4:57. Illumination was 29% at midnight, will be 34% at noon and 38% at midnight tonight. Moonset was at 0:38 this morning. Moonrise is at 10:30 this morning. Moonset is at 1:15 tomorrow morning. Moonlight time is 14 hours, 8 minutes which is 20 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is today. May Day is in four days. Mother's Day is in 16 days.
April 26: ORD
Today is April 26th. It's the 117th day of the year. 249 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 65 and 43.
On the warm side, in 1990 (O'Hare's warmest April 26th by just half a degree) the high was 85 with a low of 66 (O'Hare's warmest low of the date). Four years later, in 1994, the high was 87 (our most recent 80s high) with a low of 63. Those 60s lows in 1990 and 1994 are the only 60s lows for the date. In 1986 the high was the record high of 89 with a low of 55, a 34 degree spread. Two years earlier, in 1984, the high was 83 with a low of 51, a 32 degree spread. The other warm highs were 82 in 1983, 78 three years ago (in 2009) and 76 in 2001. Note that all five of O'Hare's post-1978 80s highs occurred in a 12-year span from 1983 through 1994. The record warmest low of 69 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 23 of the past 33 highs (70%) were in the: 50s (11) and 60s (12). O'Hare recorded consecutive 50 & 60s highs as follows: six from 1995 through 2000 and seven from 2002 through 2008. On the warm side, nine highs (27%) were in the: 70s (4) and 80s (5). O'Hare's only pre-1983 80s high was 85 degrees in 1962. On the cold side, one high (3%) was in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1977 the high was 65 with a low of 35, a 30 degree spread. In 1976 the high was a cold 49 with a low of 33, a cold day. In 1974 the high was a warm 79 with a low of 45, a 34 degree spread. In 1972 the high was 62 with a cold low of 30, a 32 degree spread. In 1970 the high was a warm 78 degrees. In 1969 the high was a warm 79 with a low of 51, a warm day. In 1967 the high was a cold 47 with a low of 33, a cold day. In 1965 the high was a cold 44 with a low of 37, a seven degree spread and cold day. In 1963 the high was 69 with a low of 37, a 32 degree spread. In 1962 the high was 85 with a low of 57, a warm day. In 1959 the high was a cold 48 degrees.
More recently, we had a small spread of six degrees in 1995 (53/47). We had additional large spreads of 41 degrees in 1983 (82/41), 37 degrees in 2006 (64/27), 35 degrees three years ago, in 2009 (78/43), 30 degrees in 1997 (65/35) and 30 degrees in 2001 (76/46).
On the cool side, in 1980 (tied with 1967 (47/33) as O'Hare's coldest April 26th)) the high was 50 with a low of 30 (the previous record low). In 1993 (tied with 1965 (44/37) as O'Hare's second coldest April 26th)) the high was 47 with a low of 34. That high of 44 in 1965 is O'Hare's coldest high of the date. In 2006 the current record low of 27 was set. The record coldest high of 38 occurred back in 1907, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the last 33 lows (85%) were in the: 30s (11) and 40s (17). O'Hare recorded 11 consecutive lows in the 30s & 40s from 1995 through 2005. O'Hare's coldest low (and tied with 1980) was 30 in 1972. One low was in the cold 20s (the record set in 2006). Four lows were in the warm: 50s (2) and 60s (2). O'Hare's third coldest April 26th was in 1976 (high of 49, low of 33).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1993 the high was 47 with a low of 34, overall 12.5 degrees BELOW normal. Then in 1994 the high was 87 with a low of 63, overall 22 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:25 and sunrise is at 5:55. Sunset is at 19:48 and twilight ends at 20:18. There's a total of 13 hours, 53 minutes of daylight today and 14 hours, 53 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:23 and sunrise is at 5:54. The moon is waxing crescent. Illumination was 21% at midnight, will be 25% at noon and 29% at midnight tonight. Moonrise was at 9:32 this morning. Moonset is at 0:38 tomorrow morning. Moonrise is at 10:30 tomorrow morning. Moonlight time is 14 hours, 28 minutes which is 48 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is tomorrow. May Day is in five days. Mother's Day is in 17 days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 65 and 43.
On the warm side, in 1990 (O'Hare's warmest April 26th by just half a degree) the high was 85 with a low of 66 (O'Hare's warmest low of the date). Four years later, in 1994, the high was 87 (our most recent 80s high) with a low of 63. Those 60s lows in 1990 and 1994 are the only 60s lows for the date. In 1986 the high was the record high of 89 with a low of 55, a 34 degree spread. Two years earlier, in 1984, the high was 83 with a low of 51, a 32 degree spread. The other warm highs were 82 in 1983, 78 three years ago (in 2009) and 76 in 2001. Note that all five of O'Hare's post-1978 80s highs occurred in a 12-year span from 1983 through 1994. The record warmest low of 69 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 23 of the past 33 highs (70%) were in the: 50s (11) and 60s (12). O'Hare recorded consecutive 50 & 60s highs as follows: six from 1995 through 2000 and seven from 2002 through 2008. On the warm side, nine highs (27%) were in the: 70s (4) and 80s (5). O'Hare's only pre-1983 80s high was 85 degrees in 1962. On the cold side, one high (3%) was in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: in 1977 the high was 65 with a low of 35, a 30 degree spread. In 1976 the high was a cold 49 with a low of 33, a cold day. In 1974 the high was a warm 79 with a low of 45, a 34 degree spread. In 1972 the high was 62 with a cold low of 30, a 32 degree spread. In 1970 the high was a warm 78 degrees. In 1969 the high was a warm 79 with a low of 51, a warm day. In 1967 the high was a cold 47 with a low of 33, a cold day. In 1965 the high was a cold 44 with a low of 37, a seven degree spread and cold day. In 1963 the high was 69 with a low of 37, a 32 degree spread. In 1962 the high was 85 with a low of 57, a warm day. In 1959 the high was a cold 48 degrees.
More recently, we had a small spread of six degrees in 1995 (53/47). We had additional large spreads of 41 degrees in 1983 (82/41), 37 degrees in 2006 (64/27), 35 degrees three years ago, in 2009 (78/43), 30 degrees in 1997 (65/35) and 30 degrees in 2001 (76/46).
On the cool side, in 1980 (tied with 1967 (47/33) as O'Hare's coldest April 26th)) the high was 50 with a low of 30 (the previous record low). In 1993 (tied with 1965 (44/37) as O'Hare's second coldest April 26th)) the high was 47 with a low of 34. That high of 44 in 1965 is O'Hare's coldest high of the date. In 2006 the current record low of 27 was set. The record coldest high of 38 occurred back in 1907, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the last 33 lows (85%) were in the: 30s (11) and 40s (17). O'Hare recorded 11 consecutive lows in the 30s & 40s from 1995 through 2005. O'Hare's coldest low (and tied with 1980) was 30 in 1972. One low was in the cold 20s (the record set in 2006). Four lows were in the warm: 50s (2) and 60s (2). O'Hare's third coldest April 26th was in 1976 (high of 49, low of 33).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1993 the high was 47 with a low of 34, overall 12.5 degrees BELOW normal. Then in 1994 the high was 87 with a low of 63, overall 22 degrees ABOVE normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:25 and sunrise is at 5:55. Sunset is at 19:48 and twilight ends at 20:18. There's a total of 13 hours, 53 minutes of daylight today and 14 hours, 53 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:23 and sunrise is at 5:54. The moon is waxing crescent. Illumination was 21% at midnight, will be 25% at noon and 29% at midnight tonight. Moonrise was at 9:32 this morning. Moonset is at 0:38 tomorrow morning. Moonrise is at 10:30 tomorrow morning. Moonlight time is 14 hours, 28 minutes which is 48 minutes shorter than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is tomorrow. May Day is in five days. Mother's Day is in 17 days.
April 25: ORD
Today is April 25th. It's the 116th day of the year. 250 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 64 and 42.
On the warm side, in 1990 (O'Hare's warmest April 25th) the high was the record high of 87 with a low of 66. You may be seeing double! The high and low temperatures in 1990 were the same for the 24th and the 25th. Four years later, in 1994 (O'Hare's second warmest April 25th), the high was 85 with a low of 59. In 1979 the high was 73 with a low of 61. 1990 and 1979 boast the only 60s lows of the date. In 1986 the high was 75 with a low of 56. The other warm highs were 82 in 2008 and 77 three years ago, in 2009. The other warm low was 54 in 1996. The record warmest low of 68 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 20 of the past 33 highs (61%) were in the: 60s (12) and 70s (8). O'Hare recorded eight consecutive highs in the 60s & 70s from 1982 through 1989. Also, there were six consecutive 60s highs from 1996 through 2001. On the warm side, three highs (9%) were in the 80s. O'Hare's third warmest April 25th was in 1962 (high of 84, low of 56). 1962 was also the year of the former record high of 86, set at Midway. On the cold side, ten highs (30%) were in the: 40s (4) and 50s (6). O'Hare's coldest highs of the date were 45 degrees in 1961 and 1976.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the high was a cold 45 with a low of 36, a cold day. In 1974 the high was 66 with a low of 36, a 30 degree spread. In 1972 the high was a cold 50 with a low of 31, a cold day. In 1971 the high was 68 with a low of 37, a 31 degree spread. In 1970 the high was 76 with a low of 54, a warm day. In 1969 the high was 72 with a low of 41, a 31 degree spread. In 1967 the high was 52 with a cold low of 28, a cold day. In 1966 the high was 73 with a low of 39, a 34 degree spread. In 1962 the high was 84 with a low of 56, a warm day. 1962 is also the year of the former record high of 86 at Midway. In 1961 the high was a cold 45 with a low of 40, a five degree spread.
More recently, we had a small spread of four degrees in 2007 (49/45). We had large spreads of 43 degrees in 1983 (71/28), 38 degrees in 2008 (82/44), 36 degrees in 2009 (77/41), 32 degrees in 1988 (70/38), 31 degrees in 1984 (70/39), 30 degrees in 1985 (71/41) and 30 degrees in 1999 (63/33).
On the cold side, in 1980 the high was 46 with a low of 30. In 2006 the high was 46 with a low of 32. The other cold low was 28 in 1983. The other cold highs were 47 in 1992 and 49 in 2007. That low of 28 in 1983 was the low point of a day which saw a high of 71. The record low of 27 was set way back in 1887. The record coldest high of 40 occurred back in 1910. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 30s (13) and 40s (13). O'Hare recorded 15 consecutive lows in the 30s & 40s from 1997 through last year, 2011. One low (3%) was in the cold 20s. Besides the low of 28 in 1983, O'Hare's only other 20s low of the date was 28 in 1967. Six lows (18%) were in the warm: 50s (4) and 60s (2). Our most recent 50s low was 54 in 1996.
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1979 the high was 73 with a low of 61, overall 15 degrees ABOVE normal. Then in 1980 the high was 46 with a low of 30, overall 14 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:27 and sunrise is at 5:57. Sunset is at 19:47 and twilight ends at 20:17. There's a total of 13 hours, 50 minutes of daylight today and 14 hours, 50 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:25 and sunrise is at 5:55. The moon is waxing crescent. Illumination was 13% at midnight, will be 17% at noon and 21% at midnight tonight. Moonrise was at 8:39 this morning. Moonset was at 23:55 tonight. Moonrise is at 9:32 tomorrow morning. Moonlight time is 15 hours, 16 minutes which is one minute shorter than yesterday. Moonlight time is at a peak today.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in two days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 64 and 42.
On the warm side, in 1990 (O'Hare's warmest April 25th) the high was the record high of 87 with a low of 66. You may be seeing double! The high and low temperatures in 1990 were the same for the 24th and the 25th. Four years later, in 1994 (O'Hare's second warmest April 25th), the high was 85 with a low of 59. In 1979 the high was 73 with a low of 61. 1990 and 1979 boast the only 60s lows of the date. In 1986 the high was 75 with a low of 56. The other warm highs were 82 in 2008 and 77 three years ago, in 2009. The other warm low was 54 in 1996. The record warmest low of 68 occurred back in 1915, at a time when the official readings were taken adjacent to Lake Michigan. 20 of the past 33 highs (61%) were in the: 60s (12) and 70s (8). O'Hare recorded eight consecutive highs in the 60s & 70s from 1982 through 1989. Also, there were six consecutive 60s highs from 1996 through 2001. On the warm side, three highs (9%) were in the 80s. O'Hare's third warmest April 25th was in 1962 (high of 84, low of 56). 1962 was also the year of the former record high of 86, set at Midway. On the cold side, ten highs (30%) were in the: 40s (4) and 50s (6). O'Hare's coldest highs of the date were 45 degrees in 1961 and 1976.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1976 the high was a cold 45 with a low of 36, a cold day. In 1974 the high was 66 with a low of 36, a 30 degree spread. In 1972 the high was a cold 50 with a low of 31, a cold day. In 1971 the high was 68 with a low of 37, a 31 degree spread. In 1970 the high was 76 with a low of 54, a warm day. In 1969 the high was 72 with a low of 41, a 31 degree spread. In 1967 the high was 52 with a cold low of 28, a cold day. In 1966 the high was 73 with a low of 39, a 34 degree spread. In 1962 the high was 84 with a low of 56, a warm day. 1962 is also the year of the former record high of 86 at Midway. In 1961 the high was a cold 45 with a low of 40, a five degree spread.
More recently, we had a small spread of four degrees in 2007 (49/45). We had large spreads of 43 degrees in 1983 (71/28), 38 degrees in 2008 (82/44), 36 degrees in 2009 (77/41), 32 degrees in 1988 (70/38), 31 degrees in 1984 (70/39), 30 degrees in 1985 (71/41) and 30 degrees in 1999 (63/33).
On the cold side, in 1980 the high was 46 with a low of 30. In 2006 the high was 46 with a low of 32. The other cold low was 28 in 1983. The other cold highs were 47 in 1992 and 49 in 2007. That low of 28 in 1983 was the low point of a day which saw a high of 71. The record low of 27 was set way back in 1887. The record coldest high of 40 occurred back in 1910. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 30s (13) and 40s (13). O'Hare recorded 15 consecutive lows in the 30s & 40s from 1997 through last year, 2011. One low (3%) was in the cold 20s. Besides the low of 28 in 1983, O'Hare's only other 20s low of the date was 28 in 1967. Six lows (18%) were in the warm: 50s (4) and 60s (2). Our most recent 50s low was 54 in 1996.
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1979 the high was 73 with a low of 61, overall 15 degrees ABOVE normal. Then in 1980 the high was 46 with a low of 30, overall 14 degrees BELOW normal.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:27 and sunrise is at 5:57. Sunset is at 19:47 and twilight ends at 20:17. There's a total of 13 hours, 50 minutes of daylight today and 14 hours, 50 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:25 and sunrise is at 5:55. The moon is waxing crescent. Illumination was 13% at midnight, will be 17% at noon and 21% at midnight tonight. Moonrise was at 8:39 this morning. Moonset was at 23:55 tonight. Moonrise is at 9:32 tomorrow morning. Moonlight time is 15 hours, 16 minutes which is one minute shorter than yesterday. Moonlight time is at a peak today.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in two days.
Wednesday, April 25, 2012
April 24: ORD
Today is April 24th. It's the 115th day of the year. 251 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 64 and 42.
On the warm side, in 1990 (O'Hare's warmest April 24th) the high was the record high of 87 with a low of 66. Four years later, in 1994, the high was 83 with a low of 54. Three years ago, in 2009, the high was 84 with a low of 49, a 35 degree spread. In 1986 the high was 81 with a low of 47, a 34 degree spread. In 1993 the high was 76 with a low of 52. In 2008 the high was 74 with a low of 54. The other warm high was 75 in 1998. The other warm low was 55 in 1979. The record warmest low of 68 was set in 1915. The record high of 87 originally occurred in 1915, making 1915 the overall warmest day. In 1915 the official observations were taken adjacent to Lake Michigan. 27 of the past 33 highs were in the: 50s (10), 60s (10) and 70s (7). On the warm side, four highs were in the 80s. O'Hare's second warmest April 24th was in 1960 (high of 85, low of 65 (one of just two 60s lows of the date)). On the cold side, two highs were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1972 the high was a cold 45 with a low of 34, a cold day. In 1971 the low was a cold 30 degrees. In 1968 the high was a cold 41 with a low of 36, a five degree spread and cold day. In 1967 the high was 40 with a low of 25, a cold day. In 1965 the high was a cold 45 with a low of 40, a five degree spread. In 1964 the high was a cold 50 degrees. In 1962 the high was a warm 78 with a low of 44, a 34 degree spread. In 1961 the high was a warm 76 with a low of 40, a 36 degree spread. In 1960 the high was 85 with a low of 65, a hot day.
More recently, we had additional large spreads of 34 degrees in 2006 (73/39), 32 degrees in 1996 (68/36), 31 degrees in 2002 (73/42) and 30 degrees in 1995 (62/32). There were no small spreads of seven degrees or less.
On the cold side, in 1980 (O'Hare's second coldest April 24th) the high was 44 with a low of 32. Three years later, in 1983, the high was 54 with a low of 32. The other cold highs were 48 in 1992, 50 in 2004, 51 in 1981 and 51 in 1984. The record low of 29 was set way back in 1910. The record coldest high of 36 was set way back in 1892. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 30s (14) and 40s (13). Six lows were in the warm: 50s (5) and 60s (1). O'Hare's coldest April 24th was in 1967 as the high was 40 (the coldest high of the date) with a low of 25 (the only 20s low and coldest low of the date). The other notable pre-1979 cold April 24ths were 1968 (41/36) and 1972 (45/34).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:28 and sunrise is at 5:58. Sunset is at 19:45 and twilight ends at 20:15. There's a total of 13 hours, 47 minutes of daylight today and 14 hours, 47 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:27 and sunrise is at 5:57. The moon is waxing crescent. Illumination was 8% at midnight, will be 10% at noon and 13% at midnight tonight. Moonrise was at 7:51 this morning. Moonset was at 23:08 tonight. Moonrise is at 8:39 tomorrow morning. Moonlight time is 15 hours, 17 minutes which is eight minutes longer than yesterday. Moonlight time is at a peak today.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in three days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 63 and the normal low is 42. I've calculated the 33-year averages at 64 and 42.
On the warm side, in 1990 (O'Hare's warmest April 24th) the high was the record high of 87 with a low of 66. Four years later, in 1994, the high was 83 with a low of 54. Three years ago, in 2009, the high was 84 with a low of 49, a 35 degree spread. In 1986 the high was 81 with a low of 47, a 34 degree spread. In 1993 the high was 76 with a low of 52. In 2008 the high was 74 with a low of 54. The other warm high was 75 in 1998. The other warm low was 55 in 1979. The record warmest low of 68 was set in 1915. The record high of 87 originally occurred in 1915, making 1915 the overall warmest day. In 1915 the official observations were taken adjacent to Lake Michigan. 27 of the past 33 highs were in the: 50s (10), 60s (10) and 70s (7). On the warm side, four highs were in the 80s. O'Hare's second warmest April 24th was in 1960 (high of 85, low of 65 (one of just two 60s lows of the date)). On the cold side, two highs were in the 40s.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1972 the high was a cold 45 with a low of 34, a cold day. In 1971 the low was a cold 30 degrees. In 1968 the high was a cold 41 with a low of 36, a five degree spread and cold day. In 1967 the high was 40 with a low of 25, a cold day. In 1965 the high was a cold 45 with a low of 40, a five degree spread. In 1964 the high was a cold 50 degrees. In 1962 the high was a warm 78 with a low of 44, a 34 degree spread. In 1961 the high was a warm 76 with a low of 40, a 36 degree spread. In 1960 the high was 85 with a low of 65, a hot day.
More recently, we had additional large spreads of 34 degrees in 2006 (73/39), 32 degrees in 1996 (68/36), 31 degrees in 2002 (73/42) and 30 degrees in 1995 (62/32). There were no small spreads of seven degrees or less.
On the cold side, in 1980 (O'Hare's second coldest April 24th) the high was 44 with a low of 32. Three years later, in 1983, the high was 54 with a low of 32. The other cold highs were 48 in 1992, 50 in 2004, 51 in 1981 and 51 in 1984. The record low of 29 was set way back in 1910. The record coldest high of 36 was set way back in 1892. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 30s (14) and 40s (13). Six lows were in the warm: 50s (5) and 60s (1). O'Hare's coldest April 24th was in 1967 as the high was 40 (the coldest high of the date) with a low of 25 (the only 20s low and coldest low of the date). The other notable pre-1979 cold April 24ths were 1968 (41/36) and 1972 (45/34).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:28 and sunrise is at 5:58. Sunset is at 19:45 and twilight ends at 20:15. There's a total of 13 hours, 47 minutes of daylight today and 14 hours, 47 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 5:27 and sunrise is at 5:57. The moon is waxing crescent. Illumination was 8% at midnight, will be 10% at noon and 13% at midnight tonight. Moonrise was at 7:51 this morning. Moonset was at 23:08 tonight. Moonrise is at 8:39 tomorrow morning. Moonlight time is 15 hours, 17 minutes which is eight minutes longer than yesterday. Moonlight time is at a peak today.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in three days.
April 23: ORD
Today is April 23rd. It's the 114th day of the year. 252 days remain. It's week 17 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 62 and the normal low is 41. I've calculated the 33-year averages at 62 and 40.
On the warm side, in 1985 (O'Hare's second warmest April 23rd) the high was 77 with a low of 59. Five years later, in 1990, the high was 80 with a low of 49, a 31 degree spread. In 2008 the high was 74 with a low of 53. The other warm high was 75 in 1979. The record high of 88 and record warmest low of 66 were set on the same hot day in 1960 at Midway. 13 of the past 33 highs (40%) were in the 60s. 11 highs (33%) were in the: 40s (4) and 50s (7). Our most recent 50s high was 56 in 2003. On the warm side, nine highs (27%) were in the: 70s (8) and 80s (1). O'Hare's warmest April 23rd was in 1960 (high of 86, low of 66). That high of 86 was O'Hare's only other 80s high of the date and the low of 66 was O'Hare's only 60s low of the date.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1975 the high was a warm 74 degrees. In 1974 the high was a cold 44 with a low of 37, a seven degree spread. In 1971 the high was 68 with a low of 32, a 36 degree spread. In 1969 the high was a cold 49 degrees. In 1967 the high was 43 with a low of 26, a cold day. In 1963 the high was a cold 45 degrees. In 1960 the high was 86 with a low of 66, a hot day and year of the record high of 88 and record warmest low of 66, both at Midway.
More recently, we've an additional small spread of seven degrees in 1988 (47/40). The additional large spreads were: 38 degrees in 1986 (63/25), 34 degrees in 1994 (69/35), 33 degrees in 1979 (75/42), 32 degrees in 1998 (72/40), 31 degrees in 1980 (72/41), 31 degrees in 2006 (72/41), 30 degrees in 1982 (67/37) and 30 degrees in 2009 (67/37).
On the cold side, in 2005 (O'Hare's second coldest April 23rd) the high was 42 (our most recent 40s high) with a low of 35, a seven degree spread. In 1984 the high was 41 (O'Hare's coldest high of the date) with a low of 37, a four degree spread. The other cold low was the record low of 25 in 1986. The record low of 25 was originally set way back in 1873. The other cold highs were 47 in 1988, 48 in 1999 and 50 in 1995. The record coldest high of 35 was set way back in 1910, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 30s (15) and 40s (14). One low was in the cold 20s (the record low) and three were in the warm 50s. O'Hare's coldest April 23rd was in 1967 (high of 43, low of 26). Another pre-1979 cold day was in 1974 (high of 44, low of 37).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1984 the high was 41 with a low of 37, overall 13 degrees BELOW normal. Then in 1985 the high was 77 with a low of 59, overall 16 degrees ABOVE normal.
Today is a major day in Chicago's snow history. In 1967, 3.4 inches fell at O'Hare. Midway had 3.1 inches and Rockford had 3.8 inches.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:30 and sunrise is at 5:59. Sunset is at 19:44 and twilight ends at 20:14. There's a total of 13 hours, 45 minutes of daylight today and 14 hours, 44 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:28 and sunrise is at 5:58. The moon is waxing crescent, having passed new two days ago at 2:18. Illumination was 3% at midnight, will be 5% at noon and 8% at midnight tonight. Moonrise was at 7:08 this morning. Moonset was at 22:17 tonight. Moonrise is at 7:51 tomorrow morning. Moonlight time is 15 hours, 9 minutes which is 18 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in four days.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980. Before this, the official site of record was on the south side of Chicago at Midway International Airport (MDW), beginning on Wednesday, July 1, 1942. From Friday, January 1, 1926 through Tuesday, June 30, 1942, the official site was at the University of Chicago. Before that, the official site was at various locations in Chicago going back to Monday, October 16, 1871. Observations taken from October 15, 1870 to October 8, 1871 were lost in the Great Chicago Fire.
According to the National Climatic Data Center (NCDC), the normal high is 62 and the normal low is 41. I've calculated the 33-year averages at 62 and 40.
On the warm side, in 1985 (O'Hare's second warmest April 23rd) the high was 77 with a low of 59. Five years later, in 1990, the high was 80 with a low of 49, a 31 degree spread. In 2008 the high was 74 with a low of 53. The other warm high was 75 in 1979. The record high of 88 and record warmest low of 66 were set on the same hot day in 1960 at Midway. 13 of the past 33 highs (40%) were in the 60s. 11 highs (33%) were in the: 40s (4) and 50s (7). Our most recent 50s high was 56 in 2003. On the warm side, nine highs (27%) were in the: 70s (8) and 80s (1). O'Hare's warmest April 23rd was in 1960 (high of 86, low of 66). That high of 86 was O'Hare's only other 80s high of the date and the low of 66 was O'Hare's only 60s low of the date.
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1975 the high was a warm 74 degrees. In 1974 the high was a cold 44 with a low of 37, a seven degree spread. In 1971 the high was 68 with a low of 32, a 36 degree spread. In 1969 the high was a cold 49 degrees. In 1967 the high was 43 with a low of 26, a cold day. In 1963 the high was a cold 45 degrees. In 1960 the high was 86 with a low of 66, a hot day and year of the record high of 88 and record warmest low of 66, both at Midway.
More recently, we've an additional small spread of seven degrees in 1988 (47/40). The additional large spreads were: 38 degrees in 1986 (63/25), 34 degrees in 1994 (69/35), 33 degrees in 1979 (75/42), 32 degrees in 1998 (72/40), 31 degrees in 1980 (72/41), 31 degrees in 2006 (72/41), 30 degrees in 1982 (67/37) and 30 degrees in 2009 (67/37).
On the cold side, in 2005 (O'Hare's second coldest April 23rd) the high was 42 (our most recent 40s high) with a low of 35, a seven degree spread. In 1984 the high was 41 (O'Hare's coldest high of the date) with a low of 37, a four degree spread. The other cold low was the record low of 25 in 1986. The record low of 25 was originally set way back in 1873. The other cold highs were 47 in 1988, 48 in 1999 and 50 in 1995. The record coldest high of 35 was set way back in 1910, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 30s (15) and 40s (14). One low was in the cold 20s (the record low) and three were in the warm 50s. O'Hare's coldest April 23rd was in 1967 (high of 43, low of 26). Another pre-1979 cold day was in 1974 (high of 44, low of 37).
There was an instance of back-to-back years in which temperatures were just about as opposite as they can be. In 1984 the high was 41 with a low of 37, overall 13 degrees BELOW normal. Then in 1985 the high was 77 with a low of 59, overall 16 degrees ABOVE normal.
Today is a major day in Chicago's snow history. In 1967, 3.4 inches fell at O'Hare. Midway had 3.1 inches and Rockford had 3.8 inches.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:30 and sunrise is at 5:59. Sunset is at 19:44 and twilight ends at 20:14. There's a total of 13 hours, 45 minutes of daylight today and 14 hours, 44 minutes between twilights. We gained three minutes of daylight from yesterday. Tomorrow twilight begins at 5:28 and sunrise is at 5:58. The moon is waxing crescent, having passed new two days ago at 2:18. Illumination was 3% at midnight, will be 5% at noon and 8% at midnight tonight. Moonrise was at 7:08 this morning. Moonset was at 22:17 tonight. Moonrise is at 7:51 tomorrow morning. Moonlight time is 15 hours, 9 minutes which is 18 minutes longer than yesterday.
Spring began on March 12th and runs for 84 days through June 3rd. Warm Spring began on April 13th and runs for 52 days through June 3rd. High temperatures in this period are usually in the 50s, 60s and 70s. Highs in the 80s and 90s occur infrequently. Arbor Day is in four days.
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