Today is May 22nd. It's the 143rd day of the year. 223 days remain. It's week 21 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 72
and the normal low is 50. I've calculated the 33-year averages at 73
and 50.
On
the warm side, in 1991 the high was 84 with a low of 67. Last year, in 2011, the high was 87 with a low of 61. In 1994 the high was 89 with a low of 58, a 31 degree spread.
Two years earlier, in 1992, the high was 83 with a low of 63. The other
warm high was 87 in 2007. The record high of 94 was set back in 1925, at a time when the official readings were taken adjacent to Lake Michigan. The
record warmest low of 75 was set in 1977 at Midway. 31 of the past 33 highs
(94%) highs were in the: 60s (12), 70s (11) and 80s (8). Two highs were in the cool 50s. O'Hare's warmest May 22nd was in 1977 (O'Hare's warmest high of the date of 91 with its warmest low of the date of 70). O'Hare's second warmest May 22nd was in 1964 as the high was 89 with a low of 65.
In
looking back through the years to the first May at O'Hare in 1959,
the following instances were notable: In 1977 the high was 91 with a
low of 70, a hot day and year of the record warmest low. In 1975 the
high was 83 with a low of 62, a warm day. In 1974 the low was a warm 64
degrees. In 1970 the high was a hot 86 with a low of 54, a 32 degree
spread and hot day. In 1969 the high was a cool 54 with a low of 41, a
cool day. In 1967 the high was a cool 57 with a low of 40, a cool
day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In
1964 the high was 89 with a low of 65, a hot day. In 1963 the high was
54 with a low of 35, a cool day. The low was colder than the record
low. In 1962 the high was a warm 84 with a low of 51, a 33 degree
spread. In 1961 the high was 60 with a low of 36, a cool day. The low
was equal to the record low.
More recently, there was a small
spread of seven degrees in 1998 (60/53). There were large spreads of
38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 33 degrees in
1995 (78/45), 32 degrees in 2007 (87/55) and 31 degrees in 1993
(76/45).
On
the cool side, in 2006 the high was 62 with the record low of 36. Three
years earlier, in 2003, the high was 61 with a low of 39. The former
record low was 37 in 1997. It was also 37 at O'Hare in 1979. O'Hare's other cold lows were
35 in 1963 and 36 in 1961. These were not official because O'Hare
was not the official station of record for Chicago during these years.
The other cool highs were 59 in 1986, 59 in 2008 and 60
in 1998. The record coolest high of 44 occurred back in 1917, at a time when the official readings were taken adjacent to Lake Michigan. 26 of
the last 33 lows (79%) were in the: 40s (11) and 50s (15). O'Hare recorded 11 consecutive lows in the 40s & 50s from 1980 through 1990. Four lows
(12%) were in the cold 30s. Three lows (9%) were in the warm 60s. O'Hare's coolest May 22nd was in 1963 as the high was its co-coolest of 54 (tied with 1969) and low of 35 (colder than the official record low).
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 4:53 and
sunrise is
at 5:26.
Sunset is at 20:15
and
twilight
ends at 20:48.
There's
a total
of 14 hours, 49 minutes of
daylight
today
and 15
hours, 55
minutes between
twilights.
We gained a minute of
daylight from
yesterday. Tomorrow
twilight
begins
at 4:52 and sunrise
is at 5:25.
The
moon is waxing crescent, having passed new two nights ago at 18:47.
Illumination
was 2% at
midnight, will be 3% at noon
and 5% at
midnight
tonight.
Moonrise was at 6:36 this morning. Moonset is at 21:53 tonight. Moonrise is at 7:28 tomorrow morning. Moonlight
time is 15 hours, 17 minutes which is one minute
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. National Maritime Day is today. Memorial Day is in six days.
Showing posts with label May 22. Show all posts
Showing posts with label May 22. Show all posts
Wednesday, May 23, 2012
Tuesday, May 24, 2011
May 22: ORD
Today is May 22nd. It's the 142nd day of the year. 223 days remain. It's week 21 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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 32-year averages at 72 and 50.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 23 of the last 32 highs (72%) highs were in the: 60s (12) and 70s (11). Seven highs (22%) were in the warmer 80s. Two highs were in the cool 50s. The highs over the past seven years were in the 60s, 70s and 80s except for 59 in 2008.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1975 the high was 83 with a low of 62, a warm day. In 1974 the low was a warm 64 degrees. In 1970 the high was a hot 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was a cool 54 with a low of 41, a cool day. In 1967 the high was a cool 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was a warm 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 33 degrees in 1995 (78/45), 32 degrees in 2007 (87/55) and 31 degrees in 1993 (76/45).
On the cool side, in 2006 the high was 62 with the record low of 36. Three years earlier, in 2003, the high was 61 with a low of 39. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs were 59 in 1986, 59 three years ago (in 2008) and 60 in 1998. The record coolest high of 44 occurred back in 1917. 26 of the last 32 lows (81%) were in the: 40s (11) and 50s (15). Four lows were in the cold 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:53 and sunrise is at 5:26. Sunset is at 20:14 and twilight ends at 20:47. There's a total of 14 hours, 48 minutes of daylight today and 15 hours, 54 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. The moon is waning gibbous. Illumination was 74% at midnight, will be 70% at noon and 65% at midnight tonight. Moonrise is at 0:11 this morning. Moonset is at 10:30 this morning. Moonrise is at 0:41 tomorrow morning. Moonlight time is 10 hours, 19 minutes which is 55 minutes longer than yesterday.
The warm part of Spring (Warm Spring) began on April 13. Warm Spring runs for 52 days, through June 3. High temperatures in this period are usually in the 50s, 60s and 70s. Warmer 80s and 90s occur infrequently. National Maritime Day is today. Memorial Day is in eight days. -Bernie-
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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 32-year averages at 72 and 50.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 23 of the last 32 highs (72%) highs were in the: 60s (12) and 70s (11). Seven highs (22%) were in the warmer 80s. Two highs were in the cool 50s. The highs over the past seven years were in the 60s, 70s and 80s except for 59 in 2008.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1975 the high was 83 with a low of 62, a warm day. In 1974 the low was a warm 64 degrees. In 1970 the high was a hot 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was a cool 54 with a low of 41, a cool day. In 1967 the high was a cool 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was a warm 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 33 degrees in 1995 (78/45), 32 degrees in 2007 (87/55) and 31 degrees in 1993 (76/45).
On the cool side, in 2006 the high was 62 with the record low of 36. Three years earlier, in 2003, the high was 61 with a low of 39. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs were 59 in 1986, 59 three years ago (in 2008) and 60 in 1998. The record coolest high of 44 occurred back in 1917. 26 of the last 32 lows (81%) were in the: 40s (11) and 50s (15). Four lows were in the cold 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:53 and sunrise is at 5:26. Sunset is at 20:14 and twilight ends at 20:47. There's a total of 14 hours, 48 minutes of daylight today and 15 hours, 54 minutes between twilights. We gained two minutes of daylight from yesterday. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. The moon is waning gibbous. Illumination was 74% at midnight, will be 70% at noon and 65% at midnight tonight. Moonrise is at 0:11 this morning. Moonset is at 10:30 this morning. Moonrise is at 0:41 tomorrow morning. Moonlight time is 10 hours, 19 minutes which is 55 minutes longer than yesterday.
The warm part of Spring (Warm Spring) began on April 13. Warm Spring runs for 52 days, through June 3. High temperatures in this period are usually in the 50s, 60s and 70s. Warmer 80s and 90s occur infrequently. National Maritime Day is today. Memorial Day is in eight days. -Bernie-
Tuesday, May 25, 2010
May 22: ORD
Today is May 22nd. It's the 142nd day of the year. 223 days remain. It's week 21 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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 31-year averages at 72 and 49.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 29 of the 31 (94%) highs were: 60s (12), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1975 the high was 83 with a low of 62, a warm day. In 1974 the low was a warm 64. In 1970 the high was a hot 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was a cool 54 with a low of 41, a cool day. In 1967 the high was a cool 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was a warm 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 33 degrees in 1995 (78/45), 32 degrees two years ago (87/55) and 31 degrees in 1993 (76/45).
On the cool side, in 2006 the high was 62 with the record low of 36. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs of note were 59 in 1986, 59 two years ago and 60 in 1998. The record coolest high of 44 occurred back in 1917. 25 of the 31 (81%) lows were: 40s (11) and 50s (14). Four lows were in the colder 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:53 and sunrise was at 5:26. Sunset is at 20:15 and twilight ends at 20:48. There's a total of 14 hours, 49 minutes of daylight today and 15 hours, 55 minutes between twilights. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. The moon is waxing gibbous. Illumination was 64% at midnight, will be 70% at noon and 75% at midnight tonight. Moonset was at 2:04 this morning. Moonrise is at 14:40 this afternoon. Moonset is 2:30 tomorrow morning. Moonrise is at 15:52 tomorrow. Moonlight time is 11 hours, 24 minutes which is 47 minutes shorter than yesterday.
National Maritime Day is today and Memorial Day is in nine days. - Bernie -
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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 31-year averages at 72 and 49.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 29 of the 31 (94%) highs were: 60s (12), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1975 the high was 83 with a low of 62, a warm day. In 1974 the low was a warm 64. In 1970 the high was a hot 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was a cool 54 with a low of 41, a cool day. In 1967 the high was a cool 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was a warm 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 33 degrees in 1995 (78/45), 32 degrees two years ago (87/55) and 31 degrees in 1993 (76/45).
On the cool side, in 2006 the high was 62 with the record low of 36. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs of note were 59 in 1986, 59 two years ago and 60 in 1998. The record coolest high of 44 occurred back in 1917. 25 of the 31 (81%) lows were: 40s (11) and 50s (14). Four lows were in the colder 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:53 and sunrise was at 5:26. Sunset is at 20:15 and twilight ends at 20:48. There's a total of 14 hours, 49 minutes of daylight today and 15 hours, 55 minutes between twilights. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. The moon is waxing gibbous. Illumination was 64% at midnight, will be 70% at noon and 75% at midnight tonight. Moonset was at 2:04 this morning. Moonrise is at 14:40 this afternoon. Moonset is 2:30 tomorrow morning. Moonrise is at 15:52 tomorrow. Moonlight time is 11 hours, 24 minutes which is 47 minutes shorter than yesterday.
National Maritime Day is today and Memorial Day is in nine days. - Bernie -
Friday, May 22, 2009
May 22: ORD
Today is May 22nd. It's the 142nd day of the year. 223 days remain. It's week 21 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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 30-year averages at 72 and 49.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 28 of the 30 (93%) highs were: 60s (11), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1970 the high was 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was 54 with a low of 41, a cool day. In 1967 the high was 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 32 degrees two years ago (87/55) and 31 degrees in 1993 (76/45).
On the cool side, three years ago the high was 62 with the record low of 36. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs of note were 59 in 1986, 59 last year and 60 in 1998. The record coolest high of 44 occurred back in 1917. 24 of the 30 (80%) lows were: 40s (11) and 50s (13). Four lows were in the colder 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:53 and sunrise was at 5:26. Sunset is at 20:15 and twilight ends at 20:48. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. There's a total of 14 hours, 49 minutes of daylight today and 15 hours, 55 minutes between twilights. The moon is waning crescent, heading towards new in two days at 7:11. Illumination was 7% at midnight, will be 4% at noon and 2% at midnight tonight. Moonrise was at 3:42. Moonset is at 18:35. Moonrise is at 4:18 tomorrow. Moonlight time is 14 hours, 53 minutes which is 48 minutes longer than yesterday.
National Maritime Day is today. Memorial Day is in three days. -Bernie-
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.
According to the National Climatic Data Center (NCDC), the normal high is 72 and the normal low is 50. I've calculated the 30-year averages at 72 and 49.
On the warm side, in 1991 the high was 84 with a low of 67. Three years later, in 1994, the high was 89 with a low of 58, a 31 degree spread. Two years earlier, in 1992, the high was 83 with a low of 63. Another warm high was 87 in 2007. The record high of 94 was set back in 1925. The record warmest low of 75 was set in 1977. 28 of the 30 (93%) highs were: 60s (11), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1977 the high was 91 with a low of 70, a hot day and year of the record warmest low. In 1970 the high was 86 with a low of 54, a 32 degree spread and hot day. In 1969 the high was 54 with a low of 41, a cool day. In 1967 the high was 57 with a low of 40, a cool day. In 1966 the high was 76 with a low of 43, a 33 degree spread. In 1964 the high was 89 with a low of 65, a hot day. In 1963 the high was 54 with a low of 35, a cool day. The low was colder than the record low. In 1962 the high was 84 with a low of 51, a 33 degree spread. In 1961 the high was 60 with a low of 36, a cool day. The low was equal to the record low.
More recently, there was a small spread of seven degrees in 1998 (60/53). There were large spreads of 38 degrees in 1979 (75/37), 36 degrees in 1980 (82/46), 32 degrees two years ago (87/55) and 31 degrees in 1993 (76/45).
On the cool side, three years ago the high was 62 with the record low of 36. The former record low was 37 in 1997. It was also 37 at O'Hare in 1979. Lows were 36 in 1961 and 35 in 1963. These were not official because O'Hare was not the official station of record for Chicago during these years. Other cool highs of note were 59 in 1986, 59 last year and 60 in 1998. The record coolest high of 44 occurred back in 1917. 24 of the 30 (80%) lows were: 40s (11) and 50s (13). Four lows were in the colder 30s. Two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:53 and sunrise was at 5:26. Sunset is at 20:15 and twilight ends at 20:48. Tomorrow twilight begins at 4:52 and sunrise is at 5:25. There's a total of 14 hours, 49 minutes of daylight today and 15 hours, 55 minutes between twilights. The moon is waning crescent, heading towards new in two days at 7:11. Illumination was 7% at midnight, will be 4% at noon and 2% at midnight tonight. Moonrise was at 3:42. Moonset is at 18:35. Moonrise is at 4:18 tomorrow. Moonlight time is 14 hours, 53 minutes which is 48 minutes longer than yesterday.
National Maritime Day is today. Memorial Day is in three days. -Bernie-
Thursday, May 22, 2008
May 22: ORD
Today is May 22nd. It's the 143rd day of the year. 223 days remain.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between 1979 and 2007. Observations have been official at O'Hare since Jan. 17, 1980.
Before this, Midway International Airport (MDW) was the official station of record from Wed. July 1, 1942 to Thu. Jan. 17, 1980. Before July 1, 1942, records were official at various locations in the city going all the way back to Mon. Oct. 16, 1871. Records before this (back to Sat. Oct. 15, 1870) were lost during the Great Chicago Fire which began on the evening of Sun. Oct. 8, 1871.
According to the National Climatic Data Center (NCDC), the normal high for today is 72 and the normal low is 50.
The 29-year averages are 73 and 49.
On the cool side, in 2006 the high was 62 with the record low of 36 (former record low was 37 which occurred in 1997). The low was also 37 at O'Hare in 1979. In 2003 the high was 61 with a low of 39. The coolest high of the last 29 years was 59 in 1986. The high in 1998 was 60. The high in 2001 was 61. The record coolest high is 44, set in 1917. 23 of the 29 lows have been in the 40s (10) and 50s (13).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:53 and sunrise is at 5:26. Sunset is at 20:15 and twilight ends at 20:48. There's a total of 14 hours, 49 minutes of sunlight and 15 hours, 55 minutes between twilights. The moon is waning gibbous with 96% visible at midnight and 94% visible at noon. Moonset is at 6:49 and moonrise is at 23:06. Moonlight time is 7 hours, 43 minutes today. The moon was full (full Flower moon) at 21:11 three days ago.
Memorial Day is in four days.
- Bernie -
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