Today is July 9th. It's the 191st day of the year. 175 days remain. It's week 28 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 85
and the normal low is 64. I've calculated the 33-year averages at 85
and 64.
On
the hot side, in 1989 (O'Hare's warmest July 9th) the high was 97 with a low of 71. In the prior year of 1988 (tied with 1974 as O'Hare's second warmest July 9th), the high was also 97 but with a "cooler" low of 68. These highs of 97 are tied with the high of 97 in 1974 as O'Hare's hottest highs of the date. The record high of 98 was set at Midway in 1974. The record warmest low of 79 occurred way back in 1897, at a time when the official readings were taken adjacent to Lake Michigan. 25 of the past 33 highs (76%) were in the: 80s (15) and 90s (10). O'Hare recorded seven consecutive 80s & 90s highs from 1987 through 1993. Eight highs (24%) were in the cool: 60s (2) and 70s (6). 1974 was the warmest July 9th prior to 1988. In 1974 (tied with 1988 as O'Hare's second warmest July 9th) the high was 97 with a low of 68. O'Hare's warmest lows of the date were 72 degrees, occurring in 1973, 1990, 1993 and 2000.
In
looking back through the years to the first July at O'Hare in 1959,
the following instances were notable: In 1974 the high was a hot 97
degrees (the low was 68). 1974 was the year of the record high of 98 at
Midway. In
1963 the high was 72 with a low of 47 (colder than the record low),
a cool day. In 1961 the high was 79 with a cold low of 49 (colder than the record low), a 30 degree spread.
More recently, there were large spreads of 33 degrees last year, in 2011 (91/61) and 32 degrees in 2005 (88/56).
On
the cool side, in 1997 (O'Hare's second coolest July 9th) the high was 69 with a low of 53. The prior year of 1996 (O'Hare's third coolest July 9th) had a high also of 69 but with a slightly warmer low of 56. These highs of 69 are O'Hare's coolest highs of the date. The record low of 50
and record coolest high of 63 occurred on the same cool day way back
in 1895, at a time when the official readings were taken adjacent to Lake Michigan. 19 of the last 33 lows (58%) were in the 60s. Seven lows (21%)
were in the cool 50s. Seven lows (21%) were in the warm 70s. O'Hare's coolest July 9th was in 1963 as the high was 72 with a low of 47 (O'Hare's coldest low of the date). O'Hare's second coldest low of the date was 49 in 1961.
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 4:52 and
sunrise is
at 5:26.
Sunset is at 20:31
and
twilight
ends at 21:05.
There's
a total
of 15 hours, 5 minutes of
daylight
today
and 16
hours,
13
minutes between
twilights.
We lost a minute of daylight from
yesterday. Tomorrow
twilight
begins
at 4:53 and sunrise
is at 5:27.
The moon is waning
gibbous and will reach last quarter tomorrow night at 20:48. Illumination
was 68% at
midnight, will be 63% at noon
and 58% at
midnight
tonight.
Moonset is at 12:01 this afternoon. Moonrise is at 23:37 tonight. Moonset is at 13:02 tomorrow afternoon. Moonlight
time is 12 hours, 24 minutes which is 36 minutes longer
than yesterday.
Summer
began on June 4th and runs
for 110
days
through September 21st. High
temperatures
in
this
period
are
usually in
the 70s and 80s.
Highs in
the 90s and 100s occur
infrequently. Parent's Day is in 13 days.
Wednesday, July 11, 2012
Monday, July 9, 2012
July 8: ORD
Today is July 8th. It's the 190th day of the year. 176 days remain. It's week 28 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 84 and the normal low is 64. I've calculated the 33-year averages at 85 and 64.
On the hot side, in 1981 (O'Hare's warmest July 8th) the high was 94 with a low of 77 (O'Hare's warmest low of the date). In 2007 the high was 94 with a low of 75. O'Hare's hottest high of the date was 97 in 1988. The record high of 99 was set in 1955 at Midway. The record warmest low of 78 occurred way back in 1881, at a time when the official readings were taken adjacent to Lake Michigan. 18 of the past 33 highs (55%) were in the 80s. O'Hare recorded eight consecutive 80s highs from 1994 through 2001. Nine highs (27%) were in the hot 90s. Six highs (18%) were in the cool: 60s (1) and 70s (5). The lone 60s high occurred three years ago, in 2009, at 65 degrees. Our most recent 70s highs were 78 in 2003 and 76 in 2004.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1969 the high was a cool 71 degrees. In 1961 the high was 72 with a low of 51, a cool day.
More recently, there was a large spread of 32 degrees in 1983 (85/53).
On the cool side, in 1984 (O'Hare's coolest July 8th) the high was 74 with the record low of 48. Three years ago, in 2009 (O'Hare's third coolest July 8th), the high was 65 (O'Hare's coolest high of the date) with a low of 61, a small four degree spread. The record coolest high of 60 occurred way back in 1883, at a time when the official readings were taken adjacent to Lake Michigan. 17 of the last 33 lows (20%) were in the 60s. Nine lows (27%) were in the cool: 40s (1) and 50s (8). Seven lows (21%) were in the warm 70s. O'Hare's second coolest July 8th was in 1961 as the high was 72 with a low of 51.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:51 and sunrise is at 5:25. Sunset is at 20:31 and twilight ends at 21:05. There's a total of 15 hours, 6 minutes of daylight today and 16 hours, 14 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:52 and sunrise is at 5:26. The moon is waning gibbous. Illumination was 77% at midnight, will be 72% at noon and 68% at midnight tonight. Moonset is at 10:59 this morning. Moonrise is at 23:11 tonight. Moonset is at 12:01 tomorrow afternoon. Moonlight time is 11 hours, 48 minutes which is 37 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent'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 84 and the normal low is 64. I've calculated the 33-year averages at 85 and 64.
On the hot side, in 1981 (O'Hare's warmest July 8th) the high was 94 with a low of 77 (O'Hare's warmest low of the date). In 2007 the high was 94 with a low of 75. O'Hare's hottest high of the date was 97 in 1988. The record high of 99 was set in 1955 at Midway. The record warmest low of 78 occurred way back in 1881, at a time when the official readings were taken adjacent to Lake Michigan. 18 of the past 33 highs (55%) were in the 80s. O'Hare recorded eight consecutive 80s highs from 1994 through 2001. Nine highs (27%) were in the hot 90s. Six highs (18%) were in the cool: 60s (1) and 70s (5). The lone 60s high occurred three years ago, in 2009, at 65 degrees. Our most recent 70s highs were 78 in 2003 and 76 in 2004.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1969 the high was a cool 71 degrees. In 1961 the high was 72 with a low of 51, a cool day.
More recently, there was a large spread of 32 degrees in 1983 (85/53).
On the cool side, in 1984 (O'Hare's coolest July 8th) the high was 74 with the record low of 48. Three years ago, in 2009 (O'Hare's third coolest July 8th), the high was 65 (O'Hare's coolest high of the date) with a low of 61, a small four degree spread. The record coolest high of 60 occurred way back in 1883, at a time when the official readings were taken adjacent to Lake Michigan. 17 of the last 33 lows (20%) were in the 60s. Nine lows (27%) were in the cool: 40s (1) and 50s (8). Seven lows (21%) were in the warm 70s. O'Hare's second coolest July 8th was in 1961 as the high was 72 with a low of 51.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:51 and sunrise is at 5:25. Sunset is at 20:31 and twilight ends at 21:05. There's a total of 15 hours, 6 minutes of daylight today and 16 hours, 14 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:52 and sunrise is at 5:26. The moon is waning gibbous. Illumination was 77% at midnight, will be 72% at noon and 68% at midnight tonight. Moonset is at 10:59 this morning. Moonrise is at 23:11 tonight. Moonset is at 12:01 tomorrow afternoon. Moonlight time is 11 hours, 48 minutes which is 37 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent's Day is in 14 days.
July 7: ORD
Today is July 7th. It's the 189th day of the year. 177 days remain. It's week 27 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 84 and the normal low is 64. I've calculated the 33-year averages at 85 and 62.
On the hot side, in 1988 (O'Hare's warmest July 7th) the high was 97 with a low of 71. Two years ago, in 2010 (O'Hare's second warmest July 7th), the high was 93 with a low of 71. The record high of 102 degrees was set in 1980. Our warmest low was 73 in 1994. The record warmest low of 78 occurred way back in 1876, at a time when the official readings were taken adjacent to Lake Michigan. 16 of the past 33 highs (49%) were in the 80s. Eight highs (24%) were in the hot: 90s (7) and 100s (1). Nine highs (27%) were in the cool: 60s (1) and 70s (8).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1969 the high was a cool 65 with a low of 60, a five degree spread and cool day. In 1967 the low was a cold 51 degrees. In 1961 the high was a cool 70 with a low of 53, a cool day. In 1959 the high was 87 with a low of 56, a 31 degree spread.
More recently, there were large spreads of: 43 degrees in 1980 (102/59), 36 degrees in 1981 (93/57), 30 degrees in 1979 (85/55) and 30 degrees in 1985 (88/58).
On the cool side, in 1984 (O'Hare's coolest July 7th) the high was 74 with a low of 47. The year earlier, 1983 (O'Hare's third coolest July 7th), the high was 79 with the record low of 45. The only post-1979 cool high was 69 in 2004. The record coolest high of 62 occurred back in 1904, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 50s (10) and 60s (16). O'Hare recorded 13 consecutive 50s & 60s lows from 1995 through 2007. 10 of these 13 (77%) were in the 60s. Two lows (6%) were in the cold 40s (45 in 1983 & 47 in 1984). Five lows (15%) were in the warm 70s. O'Hare's second coolest July 7th was in 1961 as the high was 70 with a low of 53. O'Hare's fourth coolest July 7th was in 1969 as the high was 65 (O'Hare's coolest high of the date) with a low of 60.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:51 and sunrise is at 5:25. Sunset is at 20:32 and twilight ends at 21:06. There's a total of 15 hours, 7 minutes of daylight today and 16 hours, 15 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:51 and sunrise is at 5:25. The moon is waning gibbous. Illumination was 85% at midnight, will be 81% at noon and 77% at midnight tonight. Moonset is at 9:55 this morning. Moonrise is at 22:44 tonight. Moonset is at 10:59 tomorrow morning. Moonlight time is 11 hours, 11 minutes which is 39 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent'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 84 and the normal low is 64. I've calculated the 33-year averages at 85 and 62.
On the hot side, in 1988 (O'Hare's warmest July 7th) the high was 97 with a low of 71. Two years ago, in 2010 (O'Hare's second warmest July 7th), the high was 93 with a low of 71. The record high of 102 degrees was set in 1980. Our warmest low was 73 in 1994. The record warmest low of 78 occurred way back in 1876, at a time when the official readings were taken adjacent to Lake Michigan. 16 of the past 33 highs (49%) were in the 80s. Eight highs (24%) were in the hot: 90s (7) and 100s (1). Nine highs (27%) were in the cool: 60s (1) and 70s (8).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1969 the high was a cool 65 with a low of 60, a five degree spread and cool day. In 1967 the low was a cold 51 degrees. In 1961 the high was a cool 70 with a low of 53, a cool day. In 1959 the high was 87 with a low of 56, a 31 degree spread.
More recently, there were large spreads of: 43 degrees in 1980 (102/59), 36 degrees in 1981 (93/57), 30 degrees in 1979 (85/55) and 30 degrees in 1985 (88/58).
On the cool side, in 1984 (O'Hare's coolest July 7th) the high was 74 with a low of 47. The year earlier, 1983 (O'Hare's third coolest July 7th), the high was 79 with the record low of 45. The only post-1979 cool high was 69 in 2004. The record coolest high of 62 occurred back in 1904, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 50s (10) and 60s (16). O'Hare recorded 13 consecutive 50s & 60s lows from 1995 through 2007. 10 of these 13 (77%) were in the 60s. Two lows (6%) were in the cold 40s (45 in 1983 & 47 in 1984). Five lows (15%) were in the warm 70s. O'Hare's second coolest July 7th was in 1961 as the high was 70 with a low of 53. O'Hare's fourth coolest July 7th was in 1969 as the high was 65 (O'Hare's coolest high of the date) with a low of 60.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:51 and sunrise is at 5:25. Sunset is at 20:32 and twilight ends at 21:06. There's a total of 15 hours, 7 minutes of daylight today and 16 hours, 15 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:51 and sunrise is at 5:25. The moon is waning gibbous. Illumination was 85% at midnight, will be 81% at noon and 77% at midnight tonight. Moonset is at 9:55 this morning. Moonrise is at 22:44 tonight. Moonset is at 10:59 tomorrow morning. Moonlight time is 11 hours, 11 minutes which is 39 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent's Day is in 15 days.
July 6: ORD
Today is July 6th. It's the 188th day of the year. 178 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 85 and 62.
On the hot side, in 1994 the high was 94 with a low of 72. In 1988 the high was the record high of 99 with a low of 66, a 33 degree spread. The record high of 99 was originally set way back in 1874. The other hot high was 96 in 1991 (tied with 1977 as O'Hare's second hottest high of the date). The record warmest low of 80 occurred in 1977 at Midway. 17 of the past 33 highs (52%) were in the 80s. O'Hare recorded ten consecutive 80s highs from 1996 through 2005. Eight highs (24%) were in the hot 90s. Eight highs (24%) were in the cool: 60s (1) and 70s (7). Five of the eight highs in the 90s occurred from 1986 to 1991. O'Hare's warmest July 6th was in 1977 as the high was 96 (with 1991, tied as O'Hare's second hottest high of the date) and O'Hare's warmest low of the date of 78.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 96 with a low of 78, a hot day and year of the record warmest low (80 at Midway). In 1969 the high was a cool 65 with a low of 61, a four degree spread. In 1968 the high was 81 with a cold low of 49, a 32 degree spread. In 1967 the high was 76 with a cold low of 46 (tied with the record), a 30 degree spread. In 1965 the high was 80 with a cold low of 42 (colder than the record), a 38 degree spread. In 1964 the high was a cool 72 degrees. In 1961 the high was 78 with a cold low of 48, a 30 degree spread. In 1959 the high was a cool 72 degrees.
More recently, there were additional large spreads of: 33 degrees in 1989 (95/62), 31 degrees in 2001 (81/50), 30 degrees in 1981 (88/58) and 30 degrees in 1996 (88/58).
On the cool side, in 1983 (O'Hare's coolest July 6th) the high was 71 with the co-record low of 46. Four years earlier, in 1979, the high was 78 with a low of 43. That low of 43 was colder than the record low and is O'Hare's second coldest low of the date. These 40s lows were the only ones since 1979. In 1984 the high was 74 with a low of 50. The other co-record low of 46 was set at Midway in 1979. The other cold lows were 50 in 2001 and 51 in 1992. The other cool high was 69 in 1990, O'Hare's coolest high of July 6th. The record coolest high of 63 occurred way back in 1873, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 50s (11) and 60s (15). There were consecutive lows in the 50s & 60s as follows: ten from 1984 through 1993 and ten from 2000 through 2009. 77% (20 of 26) of the 50s & 60s lows occurred in these two streaks. Two lows (6%) were in the cold 40s and five (15%) were in the warm 70s. O'Hare's coldest low of the date is 42 degrees in 1965, a low colder than the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:50 and sunrise is at 5:24. Sunset is at 20:32 and twilight ends at 21:06. There's a total of 15 hours, 8 minutes of daylight today and 16 hours, 16 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:51 and sunrise is at 5:25. The moon is waning gibbous, having reached the full Buck moon three days ago at 13:52. Illumination was 92% at midnight, will be 89% at noon and 85% at midnight tonight. Moonset is at 8:48 this morning. Moonrise is at 22:16 tonight. Moonset is at 9:55 tomorrow morning. Moonlight time is 10 hours, 32 minutes which is 38 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent'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 84 and the normal low is 63. I've calculated the 33-year averages at 85 and 62.
On the hot side, in 1994 the high was 94 with a low of 72. In 1988 the high was the record high of 99 with a low of 66, a 33 degree spread. The record high of 99 was originally set way back in 1874. The other hot high was 96 in 1991 (tied with 1977 as O'Hare's second hottest high of the date). The record warmest low of 80 occurred in 1977 at Midway. 17 of the past 33 highs (52%) were in the 80s. O'Hare recorded ten consecutive 80s highs from 1996 through 2005. Eight highs (24%) were in the hot 90s. Eight highs (24%) were in the cool: 60s (1) and 70s (7). Five of the eight highs in the 90s occurred from 1986 to 1991. O'Hare's warmest July 6th was in 1977 as the high was 96 (with 1991, tied as O'Hare's second hottest high of the date) and O'Hare's warmest low of the date of 78.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 96 with a low of 78, a hot day and year of the record warmest low (80 at Midway). In 1969 the high was a cool 65 with a low of 61, a four degree spread. In 1968 the high was 81 with a cold low of 49, a 32 degree spread. In 1967 the high was 76 with a cold low of 46 (tied with the record), a 30 degree spread. In 1965 the high was 80 with a cold low of 42 (colder than the record), a 38 degree spread. In 1964 the high was a cool 72 degrees. In 1961 the high was 78 with a cold low of 48, a 30 degree spread. In 1959 the high was a cool 72 degrees.
More recently, there were additional large spreads of: 33 degrees in 1989 (95/62), 31 degrees in 2001 (81/50), 30 degrees in 1981 (88/58) and 30 degrees in 1996 (88/58).
On the cool side, in 1983 (O'Hare's coolest July 6th) the high was 71 with the co-record low of 46. Four years earlier, in 1979, the high was 78 with a low of 43. That low of 43 was colder than the record low and is O'Hare's second coldest low of the date. These 40s lows were the only ones since 1979. In 1984 the high was 74 with a low of 50. The other co-record low of 46 was set at Midway in 1979. The other cold lows were 50 in 2001 and 51 in 1992. The other cool high was 69 in 1990, O'Hare's coolest high of July 6th. The record coolest high of 63 occurred way back in 1873, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 50s (11) and 60s (15). There were consecutive lows in the 50s & 60s as follows: ten from 1984 through 1993 and ten from 2000 through 2009. 77% (20 of 26) of the 50s & 60s lows occurred in these two streaks. Two lows (6%) were in the cold 40s and five (15%) were in the warm 70s. O'Hare's coldest low of the date is 42 degrees in 1965, a low colder than the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:50 and sunrise is at 5:24. Sunset is at 20:32 and twilight ends at 21:06. There's a total of 15 hours, 8 minutes of daylight today and 16 hours, 16 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:51 and sunrise is at 5:25. The moon is waning gibbous, having reached the full Buck moon three days ago at 13:52. Illumination was 92% at midnight, will be 89% at noon and 85% at midnight tonight. Moonset is at 8:48 this morning. Moonrise is at 22:16 tonight. Moonset is at 9:55 tomorrow morning. Moonlight time is 10 hours, 32 minutes which is 38 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent's Day is in 16 days.
Thursday, July 5, 2012
July 5: ORD
Today is July 5th. It's the 187th day of the year. 179 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 84 and 63.
On the hot side, in 1999 (O'Hare's warmest July 5th) the high was 94 with a low of 79 (O'Hare's warmest low of the date). Five years prior, in 1994 (O'Hare's second warmest July 5th), the high was 95 with a low of 77 (tied with 1977 as O'Hare's third warmest low). O'Hare's hottest high was 98 in 1988. O'Hare's second warmest low was 78 two years ago, in 2010. The record high of 102 and record warmest low of 82 were set on the same hot day back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 32 of the past 33 highs (97%) were in the: 70s (9), 80s (15) and 90s (8). One high was in the cool 60s (67 in 1983). O'Hare's third warmest July 5th was in 1977 as the high was 94 with a low of 77 (tied with 1994 as O'Hare's third warmest low).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 94 with a warm low of 77, a hot day. In 1972 the high was 73 with a cold low of 44 (a low colder than the record low which was set this day at 46 degrees), a cool day. In 1967 the high was 66 (year of the record coolest high of 65) with a low of 48, a cool day. In 1965 the high was 79 with a cold low of 42 (a low colder than the record low), a 37 degree spread and overall cool day. In 1964 the high was 83 with a cold low of 46 (tied with the record low), a 37 degree spread. In 1963 the high was 85 with a cold low of 50, a 35 degree spread. In 1961 the high was a cool 69 with a low of 53, a cool day.
More recently, there were large spreads of: 38 degrees in 1988 (98/60), 36 degrees in 1980 (94/58), 35 degrees in 1982 (95/60) and 32 degrees in 1996 (86/54).
On the cool side, in 1983 (O'Hare' second coolest July 5th) the high was 67 with a low of 48. Four years earlier, in 1979, the high was 71 with a low of 47. The record low of 46 was set in 1972 at Midway. The record coolest high of 65 occurred in 1967 at Midway. 26 of the last 33 lows (79%) were in the: 50s (10) and 60s (16). O'Hare recorded consecutive lows in the 50s & 60s as follows: seven from 1987 through 1993 and seven from 2000 through 2006 (six of these were 60s). Five lows (15%) were in the warm 70s. Two lows (6%) were in the cold 40s (in 1979 and 1983). O'Hare's coolest July 5th was in 1967 as the high was 66 (O'Hare's coolest high of the date) with a low of 48. 1983 (see above) was the second coolest July 5th. The third coolest was in 1972 as the high was 73 with a low of 44 (O'Hare' second coldest low and colder than the record low). O'Hare's coldest low of 42 occurred in 1965 (a low colder than the record low). O'Hare had a low which ties the record (46 in 1964).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:49 and sunrise is at 5:23. Sunset is at 20:32 and twilight ends at 21:07. There's a total of 15 hours, 9 minutes of daylight today and 16 hours, 18 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:50 and sunrise is at 5:24. The moon is waning gibbous, having reached the full Buck moon two days ago at 13:52. Illumination was 97% at midnight, will be 95% at noon and 92% at midnight tonight. Moonset was at 7:38 this morning. Moonrise is at 21:44 tonight. Moonset is at 8:48 tomorrow morning. Moonlight time is 9 hours, 54 minutes which is 35 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent'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 84 and the normal low is 63. I've calculated the 33-year averages at 84 and 63.
On the hot side, in 1999 (O'Hare's warmest July 5th) the high was 94 with a low of 79 (O'Hare's warmest low of the date). Five years prior, in 1994 (O'Hare's second warmest July 5th), the high was 95 with a low of 77 (tied with 1977 as O'Hare's third warmest low). O'Hare's hottest high was 98 in 1988. O'Hare's second warmest low was 78 two years ago, in 2010. The record high of 102 and record warmest low of 82 were set on the same hot day back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 32 of the past 33 highs (97%) were in the: 70s (9), 80s (15) and 90s (8). One high was in the cool 60s (67 in 1983). O'Hare's third warmest July 5th was in 1977 as the high was 94 with a low of 77 (tied with 1994 as O'Hare's third warmest low).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 94 with a warm low of 77, a hot day. In 1972 the high was 73 with a cold low of 44 (a low colder than the record low which was set this day at 46 degrees), a cool day. In 1967 the high was 66 (year of the record coolest high of 65) with a low of 48, a cool day. In 1965 the high was 79 with a cold low of 42 (a low colder than the record low), a 37 degree spread and overall cool day. In 1964 the high was 83 with a cold low of 46 (tied with the record low), a 37 degree spread. In 1963 the high was 85 with a cold low of 50, a 35 degree spread. In 1961 the high was a cool 69 with a low of 53, a cool day.
More recently, there were large spreads of: 38 degrees in 1988 (98/60), 36 degrees in 1980 (94/58), 35 degrees in 1982 (95/60) and 32 degrees in 1996 (86/54).
On the cool side, in 1983 (O'Hare' second coolest July 5th) the high was 67 with a low of 48. Four years earlier, in 1979, the high was 71 with a low of 47. The record low of 46 was set in 1972 at Midway. The record coolest high of 65 occurred in 1967 at Midway. 26 of the last 33 lows (79%) were in the: 50s (10) and 60s (16). O'Hare recorded consecutive lows in the 50s & 60s as follows: seven from 1987 through 1993 and seven from 2000 through 2006 (six of these were 60s). Five lows (15%) were in the warm 70s. Two lows (6%) were in the cold 40s (in 1979 and 1983). O'Hare's coolest July 5th was in 1967 as the high was 66 (O'Hare's coolest high of the date) with a low of 48. 1983 (see above) was the second coolest July 5th. The third coolest was in 1972 as the high was 73 with a low of 44 (O'Hare' second coldest low and colder than the record low). O'Hare's coldest low of 42 occurred in 1965 (a low colder than the record low). O'Hare had a low which ties the record (46 in 1964).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:49 and sunrise is at 5:23. Sunset is at 20:32 and twilight ends at 21:07. There's a total of 15 hours, 9 minutes of daylight today and 16 hours, 18 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:50 and sunrise is at 5:24. The moon is waning gibbous, having reached the full Buck moon two days ago at 13:52. Illumination was 97% at midnight, will be 95% at noon and 92% at midnight tonight. Moonset was at 7:38 this morning. Moonrise is at 21:44 tonight. Moonset is at 8:48 tomorrow morning. Moonlight time is 9 hours, 54 minutes which is 35 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Parent's Day is in 17 days.
Wednesday, July 4, 2012
July 4: ORD
Today is July 4th. It's the 186th day of the year. 180 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 84 and 64.
On the hot side, in 1990 (with 1977, O'Hare's warmest July 4th) the high was 96 (O'Hare's hottest high of the date) with a low of 77. In 1999 (O'Hare's second warmest July 4th by just half a degree) the high was 93 with a low of 79 (O'Hare's warmest low of the date). The other warm lows were 75 in 1993 and 74 in 1994. The record high of 102 was set way back in 1911. The record warmest low of 80 occurred back in 1921. Both records occurred at a time when the official readings were taken adjacent to Lake Michigan. 17 of the past 33 highs (52%) were in the 80s. Seven highs (21%) were in the hot 90s. Nine highs (27%) were in the cool: 60s (2) and 70s (7). Along with 1990, 1977 is also O'Hare's warmest July 4th. In 1977 the high was 95 (O'Hare's second hottest high of the date) with a low of 78 (O'Hare's second warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 95 with a warm low of 78, a hot day. In 1972 the high was 66 with a low of 49 (colder than the record low), a cool day. 1972 was also the year of the record low of 50 at Midway. In 1970 the high was a cool 72 degrees. In 1967 the high was 64 with a low of 50 (tied with the record low), a cool day. In 1964 the low was a cool 50 degrees (tied with the record low). In 1963 the high was 79 with a cold low of 46 (colder than the record low), a 33 degree spread and cool day. In 1961 the high was a cool 65 with a low of 60, a five degree spread and cool day.
More recently, there were large spreads of 33 degrees in 1988 (89/56) and 30 degrees in 1985 (91/61).
On the cool side, in 1997 the high was 66 with a low of 56. Three years ago, in 2009, the high was 69 with a low of 59. In the prior year of 2008, the high was 76 with a low of 52. In 1996 the high was 77 with a low of 51. In 1979 the high was 74 with a low of 54. The record low of 50 was set in 1972 at Midway. The record coolest high of 62 occurred back in 1920, at a time when the official readings were taken adjacent to Lake Michigan. 18 of the last 33 lows (55%) were in the 60s. Nine lows (28%) were in the cool 50s. Six lows (18%) were in the warm 70s. Our most recent 70s lows were 73 in 2003 and 70 in 2004. O'Hare's coolest July 4th was in 1967 as the high was 64 (O'Hare's coolest high of the date) with a low of 50 (tied with the record low). O'Hare's second coolest July 4th was in 1972 as the high was 66 with a low of 49 (O'Hare's second coldest low and colder than the record low). O'Hare's coldest low of the date was 46 degrees in 1963 (also colder than the record low). The low of 50 in 1964 is also tied with the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:48 and sunrise is at 5:23. Sunset is at 20:33 and twilight ends at 21:07. There's a total of 15 hours, 10 minutes of daylight today and 16 hours, 19 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:49 and sunrise is at 5:23. The moon is waning gibbous, having reached the full Buck moon yesterday at 13:52. Illumination was 100% at midnight, will be 99% at noon and 97% at midnight tonight. Moonset was at 6:27 this morning. Moonrise is at 21:08 tonight. Moonset is at 7:38 tomorrow morning. Moonlight time is 9 hours, 19 minutes which is 30 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is today.
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 84 and the normal low is 63. I've calculated the 33-year averages at 84 and 64.
On the hot side, in 1990 (with 1977, O'Hare's warmest July 4th) the high was 96 (O'Hare's hottest high of the date) with a low of 77. In 1999 (O'Hare's second warmest July 4th by just half a degree) the high was 93 with a low of 79 (O'Hare's warmest low of the date). The other warm lows were 75 in 1993 and 74 in 1994. The record high of 102 was set way back in 1911. The record warmest low of 80 occurred back in 1921. Both records occurred at a time when the official readings were taken adjacent to Lake Michigan. 17 of the past 33 highs (52%) were in the 80s. Seven highs (21%) were in the hot 90s. Nine highs (27%) were in the cool: 60s (2) and 70s (7). Along with 1990, 1977 is also O'Hare's warmest July 4th. In 1977 the high was 95 (O'Hare's second hottest high of the date) with a low of 78 (O'Hare's second warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 95 with a warm low of 78, a hot day. In 1972 the high was 66 with a low of 49 (colder than the record low), a cool day. 1972 was also the year of the record low of 50 at Midway. In 1970 the high was a cool 72 degrees. In 1967 the high was 64 with a low of 50 (tied with the record low), a cool day. In 1964 the low was a cool 50 degrees (tied with the record low). In 1963 the high was 79 with a cold low of 46 (colder than the record low), a 33 degree spread and cool day. In 1961 the high was a cool 65 with a low of 60, a five degree spread and cool day.
More recently, there were large spreads of 33 degrees in 1988 (89/56) and 30 degrees in 1985 (91/61).
On the cool side, in 1997 the high was 66 with a low of 56. Three years ago, in 2009, the high was 69 with a low of 59. In the prior year of 2008, the high was 76 with a low of 52. In 1996 the high was 77 with a low of 51. In 1979 the high was 74 with a low of 54. The record low of 50 was set in 1972 at Midway. The record coolest high of 62 occurred back in 1920, at a time when the official readings were taken adjacent to Lake Michigan. 18 of the last 33 lows (55%) were in the 60s. Nine lows (28%) were in the cool 50s. Six lows (18%) were in the warm 70s. Our most recent 70s lows were 73 in 2003 and 70 in 2004. O'Hare's coolest July 4th was in 1967 as the high was 64 (O'Hare's coolest high of the date) with a low of 50 (tied with the record low). O'Hare's second coolest July 4th was in 1972 as the high was 66 with a low of 49 (O'Hare's second coldest low and colder than the record low). O'Hare's coldest low of the date was 46 degrees in 1963 (also colder than the record low). The low of 50 in 1964 is also tied with the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:48 and sunrise is at 5:23. Sunset is at 20:33 and twilight ends at 21:07. There's a total of 15 hours, 10 minutes of daylight today and 16 hours, 19 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:49 and sunrise is at 5:23. The moon is waning gibbous, having reached the full Buck moon yesterday at 13:52. Illumination was 100% at midnight, will be 99% at noon and 97% at midnight tonight. Moonset was at 6:27 this morning. Moonrise is at 21:08 tonight. Moonset is at 7:38 tomorrow morning. Moonlight time is 9 hours, 19 minutes which is 30 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is today.
July 3: ORD
Today is July 3rd. It's the 185th day of the year. 181 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 83 and 62.
On the hot side, in 1999 (tied with 1974 as O'Hare's warmest July 3rd) the high was 92 with a low of 76 (O'Hare's warmest low of the date). In 2002 the high was 94 (with 1974, O'Hare's hottest high of the date) with a low of 73. The record high of 102 was set in 1949 at Midway. The record warmest low of 78 occurred back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 70s (10) and 80s (18). Five highs were in the hot 90s. Our most recent 90s highs were 94 in 2002 and 93 in 2003. One temperature quirk was that back in 1935, this was the date of the first high of 85 degrees or more for that year! Official readings were taken at the University of Chicago at the time. In 1974 (tied with 1999 as O'Hare's warmest July 3rd) the high was 94 (with 2002, O'Hare's hottest high of the date) with a low of 74 (O'Hare's second warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1971 the high was 87 with a low of 57, a 30 degree spread. In 1968 the high was 75 with a cold low of 48 degrees. In 1967 the high was a cool 71 degrees with a low of 51, a cool day. In 1963 the high was 67 with a low of 48, a cool day. That low of 48, just as with 1968, was colder than the record low.
More recently, there were large spreads of: 34 degrees in 1988 (86/52), 32 degrees in 2005 (86/54), 30 degrees in 1979 (85/55), 30 degrees in 1980 (80/50) and 30 degrees in 1985 (83/53).
On the cool side, in 2008 the high was 71 with a low of 55. In 1996 the high was 76 with a low of 53. A decade earlier, in 1986, the high was 77 with a low of 52. The record low of 50 was set in 1980. The other cool high was 72 in 2000. The record coolest high of 63 occurred way back in 1909, at a time when the official readings were taken adjacent to Lake Michigan. 30 of the last 33 lows (91%) were in the: 50s (11) and 60s (19). Three lows were in the warm 70s. O'Hare's coolest July 3rd was in 1963 as the high was 67 (O'Hare's coolest high of the date) with a low of 48 (with 1968, O'Hare's coldest low of the date). O'Hare's second coolest July 3rd was in 1967 as the high was 71 with a low of 51. O'Hare's third coolest July 3rd was in 1968 as the high was 75 with a low of 48. The lows of 48 in 1963 and 1968 are colder than the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:48 and sunrise is at 5:22. Sunset is at 20:33 and twilight ends at 21:07. There's a total of 15 hours, 11 minutes of daylight today and 16 hours, 19 minutes between twilights. We lost no minutes of daylight from yesterday. Tomorrow twilight begins at 4:48 and sunrise is at 5:23. The moon reaches the full Buck moon today at 13:52. Illumination was 100% at midnight, will be 100% at noon and 100% at midnight tonight. Moonset was at 5:15 this morning. Moonrise is at 20:26 tonight. Moonset is at 6:27 tomorrow morning. Moonlight time is 8 hours, 49 minutes which is 16 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is tomorrow.
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 84 and the normal low is 63. I've calculated the 33-year averages at 83 and 62.
On the hot side, in 1999 (tied with 1974 as O'Hare's warmest July 3rd) the high was 92 with a low of 76 (O'Hare's warmest low of the date). In 2002 the high was 94 (with 1974, O'Hare's hottest high of the date) with a low of 73. The record high of 102 was set in 1949 at Midway. The record warmest low of 78 occurred back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 70s (10) and 80s (18). Five highs were in the hot 90s. Our most recent 90s highs were 94 in 2002 and 93 in 2003. One temperature quirk was that back in 1935, this was the date of the first high of 85 degrees or more for that year! Official readings were taken at the University of Chicago at the time. In 1974 (tied with 1999 as O'Hare's warmest July 3rd) the high was 94 (with 2002, O'Hare's hottest high of the date) with a low of 74 (O'Hare's second warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1971 the high was 87 with a low of 57, a 30 degree spread. In 1968 the high was 75 with a cold low of 48 degrees. In 1967 the high was a cool 71 degrees with a low of 51, a cool day. In 1963 the high was 67 with a low of 48, a cool day. That low of 48, just as with 1968, was colder than the record low.
More recently, there were large spreads of: 34 degrees in 1988 (86/52), 32 degrees in 2005 (86/54), 30 degrees in 1979 (85/55), 30 degrees in 1980 (80/50) and 30 degrees in 1985 (83/53).
On the cool side, in 2008 the high was 71 with a low of 55. In 1996 the high was 76 with a low of 53. A decade earlier, in 1986, the high was 77 with a low of 52. The record low of 50 was set in 1980. The other cool high was 72 in 2000. The record coolest high of 63 occurred way back in 1909, at a time when the official readings were taken adjacent to Lake Michigan. 30 of the last 33 lows (91%) were in the: 50s (11) and 60s (19). Three lows were in the warm 70s. O'Hare's coolest July 3rd was in 1963 as the high was 67 (O'Hare's coolest high of the date) with a low of 48 (with 1968, O'Hare's coldest low of the date). O'Hare's second coolest July 3rd was in 1967 as the high was 71 with a low of 51. O'Hare's third coolest July 3rd was in 1968 as the high was 75 with a low of 48. The lows of 48 in 1963 and 1968 are colder than the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:48 and sunrise is at 5:22. Sunset is at 20:33 and twilight ends at 21:07. There's a total of 15 hours, 11 minutes of daylight today and 16 hours, 19 minutes between twilights. We lost no minutes of daylight from yesterday. Tomorrow twilight begins at 4:48 and sunrise is at 5:23. The moon reaches the full Buck moon today at 13:52. Illumination was 100% at midnight, will be 100% at noon and 100% at midnight tonight. Moonset was at 5:15 this morning. Moonrise is at 20:26 tonight. Moonset is at 6:27 tomorrow morning. Moonlight time is 8 hours, 49 minutes which is 16 minutes longer than yesterday.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is tomorrow.
Tuesday, July 3, 2012
July 2: ORD
Today is July 2nd. It's the 184th day of the year. 182 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 83 and 60.
On the hot side, in 2002 the high was 93 with a low of 75 (O'Hare's second warmest low of the date). Last year, in 2011, the high was 94 (O'Hare's third hottest high of the date) with a low of 71. Two decades earlier, in 1991, the high was 96 (O'Hare's hottest high of the date) with a low of 68. The record high of 99 was set in 1970 at Midway. The record warmest low of 79 occurred back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 20 of the past 33 highs (61%) were in the 80s. Ten highs (30%) were in the cool 70s. Three highs (9%) were in the hot 90s. O'Hare's warmest July 2nd was in 1970 as the high was 95 (O'Hare's second hottest high of the date) with a low of 78 (O'Hare's warmest low of the date). The other pre-1979 warm low was 74 in 1973 (O'Hare's third warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1978 the high was 73 with a low of 66, a seven degree spread. In 1973 the low was a warm 74 degrees. In 1970 the high was 95 with a low of 78, a hot day and year of the record high of 99 at Midway. In 1968 the high was a cool 67 with a low of 51, a cool day. In 1966 the high was 93 with a low of 59, a 34 degree spread.
More recently, there were large spreads of: 34 degrees in 1984 (83/49) and 32 degrees in 1979 (82/50).
On the cool side, in 2001 the high was 75 with the record low of 49. The record low of 49 was originally set in 1984. In 1982 the high was 73 with a low of 51. 1982 and 2001 were O'Hare's second coolest July 2nd days. O'Hare's second coolest high was 70 in 1994. The record coolest high of 62 occurred in 1940 at the University of Chicago. 29 of the last 33 lows (88%) were in the: 50s (14) and 60s (15). Two lows were in the cold 40s (the record lows). Two lows were in the warm 70s (75 in 2002 and 71 last year, in 2011). 1968 was O'Hare's coolest July 2nd as the high was 67 (O'Hare's coolest high of the date) with a low of 51.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:47 and sunrise is at 5:22. Sunset is at 20:33 and twilight ends at 21:08. There's a total of 15 hours, 11 minutes of daylight today and 16 hours, 21 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:48 and sunrise is at 5:22. The moon is waxing gibbous, heading towards the full Buck moon tomorrow at 13:52. Illumination was 97% at midnight, will be 98% at noon and 100% at midnight tonight. Moonset was at 4:08 this morning. Moonrise is at 19:35 tonight. Moonset is at 5:15 tomorrow morning. Moonlight time is 8 hours, 33 minutes which is a minute longer than yesterday. Moonlight time is at its least today for the next several days.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence 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 84 and the normal low is 63. I've calculated the 33-year averages at 83 and 60.
On the hot side, in 2002 the high was 93 with a low of 75 (O'Hare's second warmest low of the date). Last year, in 2011, the high was 94 (O'Hare's third hottest high of the date) with a low of 71. Two decades earlier, in 1991, the high was 96 (O'Hare's hottest high of the date) with a low of 68. The record high of 99 was set in 1970 at Midway. The record warmest low of 79 occurred back in 1911, at a time when the official readings were taken adjacent to Lake Michigan. 20 of the past 33 highs (61%) were in the 80s. Ten highs (30%) were in the cool 70s. Three highs (9%) were in the hot 90s. O'Hare's warmest July 2nd was in 1970 as the high was 95 (O'Hare's second hottest high of the date) with a low of 78 (O'Hare's warmest low of the date). The other pre-1979 warm low was 74 in 1973 (O'Hare's third warmest low of the date).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1978 the high was 73 with a low of 66, a seven degree spread. In 1973 the low was a warm 74 degrees. In 1970 the high was 95 with a low of 78, a hot day and year of the record high of 99 at Midway. In 1968 the high was a cool 67 with a low of 51, a cool day. In 1966 the high was 93 with a low of 59, a 34 degree spread.
More recently, there were large spreads of: 34 degrees in 1984 (83/49) and 32 degrees in 1979 (82/50).
On the cool side, in 2001 the high was 75 with the record low of 49. The record low of 49 was originally set in 1984. In 1982 the high was 73 with a low of 51. 1982 and 2001 were O'Hare's second coolest July 2nd days. O'Hare's second coolest high was 70 in 1994. The record coolest high of 62 occurred in 1940 at the University of Chicago. 29 of the last 33 lows (88%) were in the: 50s (14) and 60s (15). Two lows were in the cold 40s (the record lows). Two lows were in the warm 70s (75 in 2002 and 71 last year, in 2011). 1968 was O'Hare's coolest July 2nd as the high was 67 (O'Hare's coolest high of the date) with a low of 51.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:47 and sunrise is at 5:22. Sunset is at 20:33 and twilight ends at 21:08. There's a total of 15 hours, 11 minutes of daylight today and 16 hours, 21 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:48 and sunrise is at 5:22. The moon is waxing gibbous, heading towards the full Buck moon tomorrow at 13:52. Illumination was 97% at midnight, will be 98% at noon and 100% at midnight tonight. Moonset was at 4:08 this morning. Moonrise is at 19:35 tonight. Moonset is at 5:15 tomorrow morning. Moonlight time is 8 hours, 33 minutes which is a minute longer than yesterday. Moonlight time is at its least today for the next several days.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is in two days.
Monday, July 2, 2012
July 1: ORD
Today is July 1st. It's the 183rd day of the year. 183 days remain. It's week 27 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 84 and the normal low is 63. I've calculated the 33-year averages at 81 and 59.
On the hot side, in 2002 the high was 93 with a low of 75 (O'Hare's second warmest low of the date). In 1991 (tied with 1963 as O'Hare's second warmest July 1st) the high was 97 (O'Hare's hottest high of the date) with a low of 67, a 30 degree spread. The record high of 103 was set in 1956 at Midway. The record warmest low of 78 occurred back in 1931 at the University of Chicago. 25 of the past 33 highs (76%) were in the: 70s (12) and 80s (13). Six highs (18%) were in the hot 90s. Two highs (6%) were in the cool 60s. These were 65 degrees three years ago (in 2009) and 66 in 1986. O'Hare's warmest July 1st was in 1970 as the high was 94 (O'Hare's third hottest high of the date) with a low of 76 (O'Hare's warmest low of the date). Tied with 1991 as O'Hare's second warmest July 1st is 1963 with a high of 95 (O'Hare's second hottest high of the date) and low of 69.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1974 the high was 89 with a low of 57, a 32 degree spread. In 1970 the high was 94 with a warm low of 76, a hot day. In 1966 the high was 92 with a low of 61, a 31 degree spread. In 1965 the high was 81 with a cold low of 40, a 41 degree spread and cool day. In 1959 the high was a cool 71 degrees.
More recently, there were additional large spreads of: 34 degrees in 1989 (89/55), 33 degrees in 1979 (84/51) and 33 degrees in 1992 (91/58).
On the cool side, three years ago, in 2009, the high was 65 (O'Hare's coolest high of the date) with a low of 57. In 1982 the high was 76 with Chicago's official record low (but not O'Hare's coldest low of the date; see last line of this section) of 46, a 30 degree spread. 1982 and 2009 were O'Hare's second coolest July 1st days. The other cold lows were 49 in 1984, 50 in 2001 and 51 in 1979. These 40s lows were just two years apart! The other cool highs were 66 in 1986 (O'Hare's second coolest high of the date) and 70 in 1981. The record coolest high of 61 occurred back in 1924, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 50s (16) and 60s (13). Two lows were in the cool 40s and two were in the warm 70s (75 in 2002 and 72 last year, in 2011). O'Hare's coolest July 1st was in 1965 as the high was 81 with a low of 40 (a low colder than the record low and thus O'Hare's coldest low of the date).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:47 and sunrise is at 5:21. Sunset is at 20:33 and twilight ends at 21:08. There's a total of 15 hours, 12 minutes of daylight today and 16 hours, 21 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:47 and sunrise is at 5:22. The moon is waxing gibbous, heading towards the full Buck moon in two days at 13:52. Illumination was 91% at midnight, will be 94% at noon and 97% at midnight tonight. Moonset was at 3:08 this morning. Moonrise is at 18:36 tonight. Moonset is at 4:08 tomorrow morning. Moonlight time is 8 hours, 32 minutes which is 15 minutes shorter than yesterday. Moonlight time is at its least today for the next several days.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence 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 84 and the normal low is 63. I've calculated the 33-year averages at 81 and 59.
On the hot side, in 2002 the high was 93 with a low of 75 (O'Hare's second warmest low of the date). In 1991 (tied with 1963 as O'Hare's second warmest July 1st) the high was 97 (O'Hare's hottest high of the date) with a low of 67, a 30 degree spread. The record high of 103 was set in 1956 at Midway. The record warmest low of 78 occurred back in 1931 at the University of Chicago. 25 of the past 33 highs (76%) were in the: 70s (12) and 80s (13). Six highs (18%) were in the hot 90s. Two highs (6%) were in the cool 60s. These were 65 degrees three years ago (in 2009) and 66 in 1986. O'Hare's warmest July 1st was in 1970 as the high was 94 (O'Hare's third hottest high of the date) with a low of 76 (O'Hare's warmest low of the date). Tied with 1991 as O'Hare's second warmest July 1st is 1963 with a high of 95 (O'Hare's second hottest high of the date) and low of 69.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1974 the high was 89 with a low of 57, a 32 degree spread. In 1970 the high was 94 with a warm low of 76, a hot day. In 1966 the high was 92 with a low of 61, a 31 degree spread. In 1965 the high was 81 with a cold low of 40, a 41 degree spread and cool day. In 1959 the high was a cool 71 degrees.
More recently, there were additional large spreads of: 34 degrees in 1989 (89/55), 33 degrees in 1979 (84/51) and 33 degrees in 1992 (91/58).
On the cool side, three years ago, in 2009, the high was 65 (O'Hare's coolest high of the date) with a low of 57. In 1982 the high was 76 with Chicago's official record low (but not O'Hare's coldest low of the date; see last line of this section) of 46, a 30 degree spread. 1982 and 2009 were O'Hare's second coolest July 1st days. The other cold lows were 49 in 1984, 50 in 2001 and 51 in 1979. These 40s lows were just two years apart! The other cool highs were 66 in 1986 (O'Hare's second coolest high of the date) and 70 in 1981. The record coolest high of 61 occurred back in 1924, at a time when the official readings were taken adjacent to Lake Michigan. 29 of the last 33 lows (88%) were in the: 50s (16) and 60s (13). Two lows were in the cool 40s and two were in the warm 70s (75 in 2002 and 72 last year, in 2011). O'Hare's coolest July 1st was in 1965 as the high was 81 with a low of 40 (a low colder than the record low and thus O'Hare's coldest low of the date).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:47 and sunrise is at 5:21. Sunset is at 20:33 and twilight ends at 21:08. There's a total of 15 hours, 12 minutes of daylight today and 16 hours, 21 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:47 and sunrise is at 5:22. The moon is waxing gibbous, heading towards the full Buck moon in two days at 13:52. Illumination was 91% at midnight, will be 94% at noon and 97% at midnight tonight. Moonset was at 3:08 this morning. Moonrise is at 18:36 tonight. Moonset is at 4:08 tomorrow morning. Moonlight time is 8 hours, 32 minutes which is 15 minutes shorter than yesterday. Moonlight time is at its least today for the next several days.
Summer began on June 4th and runs for 110 days through September 21st. High temperatures in this period are usually in the 70s and 80s. Highs in the 90s and 100s occur infrequently. Independence Day is in three days.
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