Today is July 18th. It's the 200th day of the year. 166 days remain. It's week 29 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 66.
On
the hot side, last year, in 2011 (O'Hare's warmest July 18th), the high was 92 with the new record warmest low of 80 (at 6:04). The former record warmest low of 78 occurred in 1942. In 1986 (O'Hare's second warmest July 18th) the high was 93 with a low of 75. O'Hare's hottest high of 96 occurred in 1991. The record high of 100 was set in 1946 at Midway. 25 of the past 33 highs (76%) were in the: 80s (14) and 90s (11). O'Hare recorded consecutive highs in the 80s & 90s as follows: 13 from 1971 through 1983 and seven from 1993 through 1999. Eight highs (24%) were in the cool 70s. From 1979-2011, this is the average fourth hottest day of the year.
In
looking back through the years to the first July at O'Hare in 1959,
the following instances were notable: In 1966 the high was 95 with a low
of 67. The day falls short of being exceptionally hot. However, we don't reach 95 degrees all that often.
More recently, there were no additional small spreads of up to 7 degrees or large spreads of at least 30 degrees.
On the cool side, in 1979
(O'Hare's coolest July 18th) the high was 82 with a low of 45, O'Hare's coldest low of the date and a low colder than
the record low. Three decades later, in 2009, the high was 72 with a
low of 57. The record low of 53 was set in 1979 at Midway. O'Hare's coolest
high of the date was 71 degrees in 2000. The record coolest high of 62 occurred back in
1924, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the: 60s (16) and 70s (10).
O'Hare recorded consecutive lows in the 60s & 70s as follows: six from 1986 through 1991 and ten from 1993 through
2002. Six lows (18%) were in the cool: 40s (1) and 50s (5). One low (3%) was in the hot 80s (the record of 80 set last year).
The
following
astronomical data
is
provided by
the
United
States
Naval
Observatory. In
Crystal
Lake,
twilight begins
at 5:00 and
sunrise is
at 5:33.
Sunset is at 20:25
and
twilight
ends at 20:58.
There's
a total
of 14 hours, 52 minutes of
daylight
today
and 15
hours, 58 minutes between
twilights.
We lost two minutes of daylight from
yesterday. Tomorrow
twilight
begins
at 5:01 and sunrise
is at 5:34.
The moon becomes new tonight at 23:24. Illumination
was 1% at
midnight, will be 0% at noon
and 0% at
midnight
tonight. Moonrise was at 5:08 this morning.
Moonset is at 19:54 tonight. Moonrise is at 6:11 tomorrow morning. Moonlight
time is 14 hours, 46 minutes which is 19 minutes shorter
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 four days.
Wednesday, July 18, 2012
Tuesday, July 17, 2012
July 17: ORD
Today is July 17th. It's the 199th day of the year. 167 days remain. It's week 29 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 86 and 66.
On the hot side, in 1982 (O'Hare's warmest July 17th) the high was 93 with a low of 78 (O'Hare's warmest low of the date). Four years later, in 1986 (O'Hare's second warmest July 17th), the high was 94 with a low of 74. O'Hare's hottest temperature of the date was 97 in 2005. O'Hare's second hottest temperature of the date was 95 in 2006. The record high of 100 was set in 1942 at Midway after first occurring in 1887. The record warmest low of 80 occurred way back in 1878, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 80s (18) and 90s (10). Five highs were in the cool 70s, including a high three years ago (in 2009) of 70 which, had it not made it to 70, would've been the first 60s high in the history of O'Hare on July 17. From 1979-2011, today ranks as the average hottest day of the year. O'Hare's second warmest low of the date is 75 degrees in 1968.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1966 the high was 88 with a cold low of 51, a 37 degree spread. That low of 51 is equal to the record low, set in 1985.
More recently, there was a large spread of 34 degrees in 1989 (89/55).
On the cool side, in 1979 (O'Hare's coolest July 17th) the high was 71 with a low of 50 (O'Hare's coldest low of the date), a reading colder than the record low of 51 which was set in 1985. In 2009 the high was 70 (O'Hare's coolest high of the date) with a low of 57. The record coolest high of 64 occurred back in 1924, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the last 33 lows (85%) were in the: 60s (18) and 70s (10). Five lows were in the cool 50s. O'Hare had a cold low of 51 in 1966 which is tied with the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:59 and sunrise is at 5:32. Sunset is at 20:26 and twilight ends at 20:59. There's a total of 14 hours, 54 minutes of daylight today and 16 hours between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 5:00 and sunrise is at 5:33. The moon is waning crescent, heading towards new tomorrow night at 23:24. Illumination was 4% at midnight, will be 2% at noon and 1% at midnight tonight. Moonrise was at 4:10 this morning. Moonset is at 19:15 tonight. Moonrise is at 5:08 tomorrow morning. Moonlight time is 15 hours, 5 minutes which is 11 minutes shorter 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 five 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 86 and 66.
On the hot side, in 1982 (O'Hare's warmest July 17th) the high was 93 with a low of 78 (O'Hare's warmest low of the date). Four years later, in 1986 (O'Hare's second warmest July 17th), the high was 94 with a low of 74. O'Hare's hottest temperature of the date was 97 in 2005. O'Hare's second hottest temperature of the date was 95 in 2006. The record high of 100 was set in 1942 at Midway after first occurring in 1887. The record warmest low of 80 occurred way back in 1878, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the past 33 highs (85%) were in the: 80s (18) and 90s (10). Five highs were in the cool 70s, including a high three years ago (in 2009) of 70 which, had it not made it to 70, would've been the first 60s high in the history of O'Hare on July 17. From 1979-2011, today ranks as the average hottest day of the year. O'Hare's second warmest low of the date is 75 degrees in 1968.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1966 the high was 88 with a cold low of 51, a 37 degree spread. That low of 51 is equal to the record low, set in 1985.
More recently, there was a large spread of 34 degrees in 1989 (89/55).
On the cool side, in 1979 (O'Hare's coolest July 17th) the high was 71 with a low of 50 (O'Hare's coldest low of the date), a reading colder than the record low of 51 which was set in 1985. In 2009 the high was 70 (O'Hare's coolest high of the date) with a low of 57. The record coolest high of 64 occurred back in 1924, at a time when the official readings were taken adjacent to Lake Michigan. 28 of the last 33 lows (85%) were in the: 60s (18) and 70s (10). Five lows were in the cool 50s. O'Hare had a cold low of 51 in 1966 which is tied with the record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:59 and sunrise is at 5:32. Sunset is at 20:26 and twilight ends at 20:59. There's a total of 14 hours, 54 minutes of daylight today and 16 hours between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 5:00 and sunrise is at 5:33. The moon is waning crescent, heading towards new tomorrow night at 23:24. Illumination was 4% at midnight, will be 2% at noon and 1% at midnight tonight. Moonrise was at 4:10 this morning. Moonset is at 19:15 tonight. Moonrise is at 5:08 tomorrow morning. Moonlight time is 15 hours, 5 minutes which is 11 minutes shorter 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 five days.
Monday, July 16, 2012
July 16: ORD
Today is July 16th. It's the 198th day of the year. 168 days remain. It's week 29 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 86 and 65.
On the hot side, in 1988 (O'Hare's warmest July 16th) the high was 99 with a low of 70. In 2006 the high was 94 with a low of 74. In 1995 the high was 93 with a low of 74. Those lows of 74 were O'Hare's second warmest lows of the date. O'Hare's warmest low of the date was 75 in 1982. The record high of 100 was set way back in 1887. The record warmest low of 80 occurred way back in 1878. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 30 of the past 33 highs (91%) were in the: 80s (17) and 90s (13). For 19 consecutive years, from 1993 through last year, 2011, highs were in the 80s and 90s. Three highs were in the cool 70s, most recently 75 in 1992. Through 2011, this is the average third hottest day of the year.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1967 the high was 79 with a cold low of 49, a 30 degree spread. That low of 49 equals the record low of 49. In 1962 the high was a cool 72 degrees.
More recently, there were no small spreads of up to seven degrees or large spreads of at least 30 degrees.
On the cool side, in 1979 (O'Hare's second coolest July 16th) the high was 74 with a low of 55. In 1987 the high was 80 with a low of 52, O'Hare's second coldest low of the date. The record low of 49 was set in 1945 at Midway. The record coolest high of 62 occurred back in 1912, at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 60s (16) and 70s (11). Six lows were in the cool 50s, most recently 59 in 2003. O'Hare's coolest July 16th was in 1967 as the high was 79 with a low of 49, O'Hare's coldest low of the date and is equal to the official record low. O'Hare's coolest high of 72 occurred in 1962.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:58 and sunrise is at 5:32. Sunset is at 20:27 and twilight ends at 21:00. There's a total of 14 hours, 55 minutes of daylight today and 16 hours, 2 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:59 and sunrise is at 5:32. The moon is waning crescent. Illumination was 8% at midnight, will be 6% at noon and 4% at midnight tonight. Moonrise was at 3:16 this morning. Moonset is at 18:32 tonight. Moonrise is at 4:10 tomorrow morning. Moonlight time is 15 hours, 16 minutes which is 1 minute shorter than yesterday. Moonlight is at its peak today.
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 six 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 86 and 65.
On the hot side, in 1988 (O'Hare's warmest July 16th) the high was 99 with a low of 70. In 2006 the high was 94 with a low of 74. In 1995 the high was 93 with a low of 74. Those lows of 74 were O'Hare's second warmest lows of the date. O'Hare's warmest low of the date was 75 in 1982. The record high of 100 was set way back in 1887. The record warmest low of 80 occurred way back in 1878. Both records were set at a time when the official readings were taken adjacent to Lake Michigan. 30 of the past 33 highs (91%) were in the: 80s (17) and 90s (13). For 19 consecutive years, from 1993 through last year, 2011, highs were in the 80s and 90s. Three highs were in the cool 70s, most recently 75 in 1992. Through 2011, this is the average third hottest day of the year.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1967 the high was 79 with a cold low of 49, a 30 degree spread. That low of 49 equals the record low of 49. In 1962 the high was a cool 72 degrees.
More recently, there were no small spreads of up to seven degrees or large spreads of at least 30 degrees.
On the cool side, in 1979 (O'Hare's second coolest July 16th) the high was 74 with a low of 55. In 1987 the high was 80 with a low of 52, O'Hare's second coldest low of the date. The record low of 49 was set in 1945 at Midway. The record coolest high of 62 occurred back in 1912, at a time when the official readings were taken adjacent to Lake Michigan. 27 of the last 33 lows (82%) were in the: 60s (16) and 70s (11). Six lows were in the cool 50s, most recently 59 in 2003. O'Hare's coolest July 16th was in 1967 as the high was 79 with a low of 49, O'Hare's coldest low of the date and is equal to the official record low. O'Hare's coolest high of 72 occurred in 1962.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:58 and sunrise is at 5:32. Sunset is at 20:27 and twilight ends at 21:00. There's a total of 14 hours, 55 minutes of daylight today and 16 hours, 2 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:59 and sunrise is at 5:32. The moon is waning crescent. Illumination was 8% at midnight, will be 6% at noon and 4% at midnight tonight. Moonrise was at 3:16 this morning. Moonset is at 18:32 tonight. Moonrise is at 4:10 tomorrow morning. Moonlight time is 15 hours, 16 minutes which is 1 minute shorter than yesterday. Moonlight is at its peak today.
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 six days.
July 15: ORD
Today is July 15th. It's the 197th day of the year. 169 days remain. It's week 29 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 86 and 65.
On the hot side, in 1980 (O'Hare's warmest July 15th) the high was 98 with the record warmest low of 82. In 1995 (O'Hare's second warmest July 15th) the high was 98 with a low of 75. In 1988 (tied with 1977 as O'Hare's third warmest July 15th) the high was the record high of 102 with a low of 70, a 32 degree spread. In 2006 the high was 97 with a low of 74. 28 of the past 33 highs (85%) were in the: 80s (18) and 90s (10). We've had 80s & 90s highs for the past 19 consecutive years (since 1993). One high was in the hot 100s (the record of 102 in 1988). Four highs were in the cool 70s. Our most recent 70s high was 77 in 1992. Tied with 1988 as O'Hare's third warmest July 15th is 1977 as the high was 98 with a low of 74. Through 2011, this is the average second hottest day of the year.
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 a hot 98 with a low of 74, a hot day. In 1967 the high was 70 with a low of 49, a cool day. That low of 49 was colder than the record low of 52, which occurred this year (1967). In 1964 the high was 88 with a low of 56, a 32 degree spread. In 1962 the high was a cool 67 with a low of 60, a seven degree spread.
More recently, there was a small spread of seven degrees in 1981 (75/68). There were additional large spreads of 33 degrees in 1991 (87/54) and 31 degrees in 2002 (91/60).
On the cool side, in 1987 (O'Hare's second coolest July 15th) the high was 70 with a low of 54. Three years later, in 1990, the high was 72 with a low of 61. The record low of 52 was last set in 1967 at Midway, having first been set in 1945 at Midway. The record coolest high of 65 occurred back in 1903, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the 60s (17) and 70s (9). There were consecutive 60s & 70s lows as follows: seven from 1994 through 2000 and seven from 2005 through last year, 2011. Six lows (18%) were in the cool 50s. Our most recent 50s low was 59 in 2004. One low (3%) was in the hot 80s (82 in 1980). O'Hare's coolest July 15th was in 1967 as the high was 70 with a low of 49, O'Hare's coldest low of the date and a low which is colder than the official record low. O'Hare's coolest high of the date is 67 degrees in 1962.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:57 and sunrise is at 5:31. Sunset is at 20:28 and twilight ends at 21:01. There's a total of 14 hours, 57 minutes of daylight today and 16 hours, 4 minutes between twilights. We lost a minutes of daylight from yesterday. Tomorrow twilight begins at 4:58 and sunrise is at 5:32. The moon is waning crescent. Illumination was 14% at midnight, will be 11% at noon and 8% at midnight tonight. Moonrise was at 2:28 this morning. Moonset is at 17:45 this afternoon. Moonrise is at 3:16 tomorrow morning. Moonlight time is 15 hours, 17 minutes which is 9 minutes longer than yesterday. Moonlight is at its peak today and tomorrow.
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 seven 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 85 and the normal low is 64. I've calculated the 33-year averages at 86 and 65.
On the hot side, in 1980 (O'Hare's warmest July 15th) the high was 98 with the record warmest low of 82. In 1995 (O'Hare's second warmest July 15th) the high was 98 with a low of 75. In 1988 (tied with 1977 as O'Hare's third warmest July 15th) the high was the record high of 102 with a low of 70, a 32 degree spread. In 2006 the high was 97 with a low of 74. 28 of the past 33 highs (85%) were in the: 80s (18) and 90s (10). We've had 80s & 90s highs for the past 19 consecutive years (since 1993). One high was in the hot 100s (the record of 102 in 1988). Four highs were in the cool 70s. Our most recent 70s high was 77 in 1992. Tied with 1988 as O'Hare's third warmest July 15th is 1977 as the high was 98 with a low of 74. Through 2011, this is the average second hottest day of the year.
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 a hot 98 with a low of 74, a hot day. In 1967 the high was 70 with a low of 49, a cool day. That low of 49 was colder than the record low of 52, which occurred this year (1967). In 1964 the high was 88 with a low of 56, a 32 degree spread. In 1962 the high was a cool 67 with a low of 60, a seven degree spread.
More recently, there was a small spread of seven degrees in 1981 (75/68). There were additional large spreads of 33 degrees in 1991 (87/54) and 31 degrees in 2002 (91/60).
On the cool side, in 1987 (O'Hare's second coolest July 15th) the high was 70 with a low of 54. Three years later, in 1990, the high was 72 with a low of 61. The record low of 52 was last set in 1967 at Midway, having first been set in 1945 at Midway. The record coolest high of 65 occurred back in 1903, at a time when the official readings were taken adjacent to Lake Michigan. 26 of the last 33 lows (79%) were in the 60s (17) and 70s (9). There were consecutive 60s & 70s lows as follows: seven from 1994 through 2000 and seven from 2005 through last year, 2011. Six lows (18%) were in the cool 50s. Our most recent 50s low was 59 in 2004. One low (3%) was in the hot 80s (82 in 1980). O'Hare's coolest July 15th was in 1967 as the high was 70 with a low of 49, O'Hare's coldest low of the date and a low which is colder than the official record low. O'Hare's coolest high of the date is 67 degrees in 1962.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:57 and sunrise is at 5:31. Sunset is at 20:28 and twilight ends at 21:01. There's a total of 14 hours, 57 minutes of daylight today and 16 hours, 4 minutes between twilights. We lost a minutes of daylight from yesterday. Tomorrow twilight begins at 4:58 and sunrise is at 5:32. The moon is waning crescent. Illumination was 14% at midnight, will be 11% at noon and 8% at midnight tonight. Moonrise was at 2:28 this morning. Moonset is at 17:45 this afternoon. Moonrise is at 3:16 tomorrow morning. Moonlight time is 15 hours, 17 minutes which is 9 minutes longer than yesterday. Moonlight is at its peak today and tomorrow.
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 seven days.
July 14: ORD
Today is July 14th. It's the 196th day of the year. 170 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 1995 (O'Hare's warmest July 14th) the high was the co-record high of 100 with the record warmest low of 83. In 1988 the high was the co-record high of 100 with a low of 69, a 31 degree spread. In 1980 the high was 97 with a low of 71. 17 of the past 33 highs (52%) were in the 80s. 11 consecutive 80s highs (65% of them) occurred from 1999 through 2009. O'Hare also recorded another six 80s highs over the past 33 years. Eight highs (24%) were in the hot: 90s (6) and 100s (2). Eight highs (24%) were in the cool: 60s (1) and 70s (7). From 1979 onward, all of the 70s highs occurred from 1987 through 1996, most recently 77 in 1996. O'Hare's second warmest July 14th was in 1977 as the high was 98 with a low of 77. The third warmest was the prior year of 1976 as the high was 98 with a low of 72. 1974 was also a warm day as the high was 95 with a low of 74.
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 98 with a low of 77, a hot day. In 1976 the high was a hot 98 with a low of 72, a hot day. In 1967 the high was 70 with a low of 51, a cool day. That low of 51 was colder than the record low. In 1962 the high was a cool 69 with a low of 62, a seven degree spread. In 1960 the high was a cool 71 degrees.
More recently, there was an additional large spread of 32 degrees in 2002 (88/56).
On the cool side, in 1990 the high was 65 (O'Hare's coolest high of the date) with a low of 60, a spread of five degrees. A couple of years later, in 1992, the high was 70 with a low of 60. The record low of 52 was set back in 1926. The record coolest high of 64 occurred back in 1930. Both records were set at the University of Chicago. 20 of the last 33 lows (61%) were in the 60s. Six lows (18%) were in the cold 50s. Seven lows (21%) were in the warm: 70s (6) and 80s (1). O'Hare's coolest July 14th was in 1967 as the high was 70 with a low of 51, a low colder than the record low and 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 4:56 and sunrise is at 5:30. Sunset is at 20:28 and twilight ends at 21:02. There's a total of 14 hours, 58 minutes of daylight today and 16 hours, 6 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:57 and sunrise is at 5:31. The moon is waning crescent. Illumination was 22% at midnight, will be 18% at noon and 14% at midnight tonight. Moonrise was at 1:45 this morning. Moonset is at 16:53 this afternoon. Moonrise is at 2:28 tomorrow morning. Moonlight time is 15 hours, 8 minutes which is 19 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 eight 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 85 and the normal low is 64. I've calculated the 33-year averages at 85 and 64.
On the hot side, in 1995 (O'Hare's warmest July 14th) the high was the co-record high of 100 with the record warmest low of 83. In 1988 the high was the co-record high of 100 with a low of 69, a 31 degree spread. In 1980 the high was 97 with a low of 71. 17 of the past 33 highs (52%) were in the 80s. 11 consecutive 80s highs (65% of them) occurred from 1999 through 2009. O'Hare also recorded another six 80s highs over the past 33 years. Eight highs (24%) were in the hot: 90s (6) and 100s (2). Eight highs (24%) were in the cool: 60s (1) and 70s (7). From 1979 onward, all of the 70s highs occurred from 1987 through 1996, most recently 77 in 1996. O'Hare's second warmest July 14th was in 1977 as the high was 98 with a low of 77. The third warmest was the prior year of 1976 as the high was 98 with a low of 72. 1974 was also a warm day as the high was 95 with a low of 74.
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 98 with a low of 77, a hot day. In 1976 the high was a hot 98 with a low of 72, a hot day. In 1967 the high was 70 with a low of 51, a cool day. That low of 51 was colder than the record low. In 1962 the high was a cool 69 with a low of 62, a seven degree spread. In 1960 the high was a cool 71 degrees.
More recently, there was an additional large spread of 32 degrees in 2002 (88/56).
On the cool side, in 1990 the high was 65 (O'Hare's coolest high of the date) with a low of 60, a spread of five degrees. A couple of years later, in 1992, the high was 70 with a low of 60. The record low of 52 was set back in 1926. The record coolest high of 64 occurred back in 1930. Both records were set at the University of Chicago. 20 of the last 33 lows (61%) were in the 60s. Six lows (18%) were in the cold 50s. Seven lows (21%) were in the warm: 70s (6) and 80s (1). O'Hare's coolest July 14th was in 1967 as the high was 70 with a low of 51, a low colder than the record low and 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 4:56 and sunrise is at 5:30. Sunset is at 20:28 and twilight ends at 21:02. There's a total of 14 hours, 58 minutes of daylight today and 16 hours, 6 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:57 and sunrise is at 5:31. The moon is waning crescent. Illumination was 22% at midnight, will be 18% at noon and 14% at midnight tonight. Moonrise was at 1:45 this morning. Moonset is at 16:53 this afternoon. Moonrise is at 2:28 tomorrow morning. Moonlight time is 15 hours, 8 minutes which is 19 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 eight days.
Sunday, July 15, 2012
July 13: ORD
Today is July 13th. It's the 195th day of the year. 171 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 84 and 64.
On the hot side, in 1995 (O'Hare's warmest July 13th) the high was the record high of 104 with the record warmest low of 81. That high of 104 is tied with June 20, 1988 as O'Hare's hottest temperature in its history. Two years later, in 1997 (O'Hare's third warmest July 13th), the high was 94 with a low of 72. 25 of the past 33 highs (76%) were in the: 70s (10) and 80s (15). O'Hare recorded 14 consecutive 70s & 80s highs from 1998 through last year, 2011. Seven highs (21%) were in the hot: 90s (6) and 100s (1). Our most recent 90s high was 94 in 1997. One high (3%) was in the cool 60s (66 in 1990, O'Hare's coolest high of the date). O'Hare's: second warmest July 13th was in 1973 (high of 95, low of 72) and fourth warmest July 13th was in 1974 (high of 95, low of 69).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1976 the high was 86 with a low of 53, a 33 degree spread. In 1974 the high was a hot 95 with a low of 69, hot but not a hot day compared to normal. In 1973 the high was a hot 95 with a low of 72, hot but not a hot day compared to normal. In 1967 the high was 67 with a low of 52, a cool day. That low of 52 was equal to the record low. In 1964 the high was 71 with a low of 49, a cool day. That low of 49 was colder than the record low.
More recently, there was a large spread of 33 degrees in 1983 (89/56).
On the cool side, in 1990 the high was 66 (O'Hare's coolest high of the date) with a low of 59, a seven degree spread. Three years earlier, in 1987, the high was 74 with a low of 54. The other cool high was 72 in 1994. The record low of 52 was set in 1975 at Midway. The record coolest high of 64 occurred back in 1926 at the University of Chicago. 18 of the last 33 lows (55%) were in the 60s. Nine lows (27%) were in the cold 50s. Six lows (18%) were in the warm: 70s (5) and 80s (1). O'Hare's coolest July 13th was in 1967 as the high was 67 (O'Hare's second coolest high of the date) with a low of 52 (equal to the record low). O'Hare's second coolest July 13th was in 1964 as the high was 71 with a low of 49 (O'Hare's coldest low of the date and only 40s low of the date). That low of 49 is also colder than the official record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:55 and sunrise is at 5:29. Sunset is at 20:29 and twilight ends at 21:02. There's a total of 15 hours of daylight today and 16 hours, 7 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:56 and sunrise is at 5:30. The moon is waning crescent. Illumination was 30% at midnight, will be 26% at noon and 22% at midnight tonight. Moonrise was at 1:08 this morning. Moonset is at 15:57 this afternoon. Moonrise is at 1:45 tomorrow morning. Moonlight time is 14 hours, 49 minutes which is 24 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 nine 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 85 and the normal low is 64. I've calculated the 33-year averages at 84 and 64.
On the hot side, in 1995 (O'Hare's warmest July 13th) the high was the record high of 104 with the record warmest low of 81. That high of 104 is tied with June 20, 1988 as O'Hare's hottest temperature in its history. Two years later, in 1997 (O'Hare's third warmest July 13th), the high was 94 with a low of 72. 25 of the past 33 highs (76%) were in the: 70s (10) and 80s (15). O'Hare recorded 14 consecutive 70s & 80s highs from 1998 through last year, 2011. Seven highs (21%) were in the hot: 90s (6) and 100s (1). Our most recent 90s high was 94 in 1997. One high (3%) was in the cool 60s (66 in 1990, O'Hare's coolest high of the date). O'Hare's: second warmest July 13th was in 1973 (high of 95, low of 72) and fourth warmest July 13th was in 1974 (high of 95, low of 69).
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1976 the high was 86 with a low of 53, a 33 degree spread. In 1974 the high was a hot 95 with a low of 69, hot but not a hot day compared to normal. In 1973 the high was a hot 95 with a low of 72, hot but not a hot day compared to normal. In 1967 the high was 67 with a low of 52, a cool day. That low of 52 was equal to the record low. In 1964 the high was 71 with a low of 49, a cool day. That low of 49 was colder than the record low.
More recently, there was a large spread of 33 degrees in 1983 (89/56).
On the cool side, in 1990 the high was 66 (O'Hare's coolest high of the date) with a low of 59, a seven degree spread. Three years earlier, in 1987, the high was 74 with a low of 54. The other cool high was 72 in 1994. The record low of 52 was set in 1975 at Midway. The record coolest high of 64 occurred back in 1926 at the University of Chicago. 18 of the last 33 lows (55%) were in the 60s. Nine lows (27%) were in the cold 50s. Six lows (18%) were in the warm: 70s (5) and 80s (1). O'Hare's coolest July 13th was in 1967 as the high was 67 (O'Hare's second coolest high of the date) with a low of 52 (equal to the record low). O'Hare's second coolest July 13th was in 1964 as the high was 71 with a low of 49 (O'Hare's coldest low of the date and only 40s low of the date). That low of 49 is also colder than the official record low.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:55 and sunrise is at 5:29. Sunset is at 20:29 and twilight ends at 21:02. There's a total of 15 hours of daylight today and 16 hours, 7 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:56 and sunrise is at 5:30. The moon is waning crescent. Illumination was 30% at midnight, will be 26% at noon and 22% at midnight tonight. Moonrise was at 1:08 this morning. Moonset is at 15:57 this afternoon. Moonrise is at 1:45 tomorrow morning. Moonlight time is 14 hours, 49 minutes which is 24 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 nine days.
Thursday, July 12, 2012
July 12: ORD
Today is July 12th. It's the 194th day of the year. 172 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 84 and 64.
On the hot side, in 1995 (O'Hare's warmest July 12th) the high was the record high of 97 (also our most recent 90s high) with a low of 73. The record high of 97 originally occurred in 1952 and was tied in 1954. In 1981 (tied with 1966 as O'Hare's second warmest July 12th) the high was 94 with a low of 73. The record warmest low of 79 occurred back in 1921, at a time when the official readings were taken adjacent to Lake Michigan. 23 of the past 33 highs (70%) were in the 80s. There were two significant streaks of 80s highs. The first was six years from 1996 through 2001. The second was nine years from 2003 through last year, 2011. Six highs (18%) were in the hot 90s and four highs (12%) were in the cool 70s. Tied with 1981 as O'Hare's second warmest July 12th is 1966 with a high of 93 and low of 74. O'Hare's warmest low of the date is 75 in 1972. Prior to 1979, 1972 was also one of O'Hare's warmest as the high was 90 that day.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1973 the high was 90 with a low of 58, a 32 degree spread. In 1968 the high was 86 with a low of 56, a 30 degree spread. In 1965 the high was 83 with a cold low of 52 (colder than the record low), a 31 degree spread. In 1964 the high was 69 with a low of 52 (colder than the record low), a cool day. Temperatures on July 12th in 1975 and 1976 were identical (high of 76, low of 56).
More recently, there were no small spreads (7 degrees or less) or large spreads (30 degrees or more).
On the cool side, in 1990 the high was 73 with a low of 59. In 1999 the high was 82 with the record low of 53. The former record low was 55 in 1975 at Midway. The record coolest high of 65 occurred in 1940 at the University of Chicago. 19 of the last 33 lows (58%) were in the 60s. Nine lows (27%) were in the cold 50s and five lows (15%) were in the warm 70s. 1964 was O'Hare's coolest July 12th as the high was 69 (O'Hare's coolest high of the date) with a low of 52 (along with the low of 52 in 1965, O'Hare's coldest lows and colder than the record low of 53 set in 1999).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:55 and sunrise is at 5:28. Sunset is at 20:29 and twilight ends at 21:03. There's a total of 15 hours, 1 minute of daylight today and 16 hours, 8 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:55 and sunrise is at 5:29. The moon is waning crescent, having reached last quarter two nights ago at 20:48. Illumination was 39% at midnight, will be 34% at noon and 30% at midnight tonight. Moonrise was at 0:35 this morning. Moonset is at 15:00 this afternoon. Moonrise is at 1:08 tomorrow morning. Moonlight time is 14 hours, 25 minutes which is 28 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 ten 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 85 and the normal low is 64. I've calculated the 33-year averages at 84 and 64.
On the hot side, in 1995 (O'Hare's warmest July 12th) the high was the record high of 97 (also our most recent 90s high) with a low of 73. The record high of 97 originally occurred in 1952 and was tied in 1954. In 1981 (tied with 1966 as O'Hare's second warmest July 12th) the high was 94 with a low of 73. The record warmest low of 79 occurred back in 1921, at a time when the official readings were taken adjacent to Lake Michigan. 23 of the past 33 highs (70%) were in the 80s. There were two significant streaks of 80s highs. The first was six years from 1996 through 2001. The second was nine years from 2003 through last year, 2011. Six highs (18%) were in the hot 90s and four highs (12%) were in the cool 70s. Tied with 1981 as O'Hare's second warmest July 12th is 1966 with a high of 93 and low of 74. O'Hare's warmest low of the date is 75 in 1972. Prior to 1979, 1972 was also one of O'Hare's warmest as the high was 90 that day.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1973 the high was 90 with a low of 58, a 32 degree spread. In 1968 the high was 86 with a low of 56, a 30 degree spread. In 1965 the high was 83 with a cold low of 52 (colder than the record low), a 31 degree spread. In 1964 the high was 69 with a low of 52 (colder than the record low), a cool day. Temperatures on July 12th in 1975 and 1976 were identical (high of 76, low of 56).
More recently, there were no small spreads (7 degrees or less) or large spreads (30 degrees or more).
On the cool side, in 1990 the high was 73 with a low of 59. In 1999 the high was 82 with the record low of 53. The former record low was 55 in 1975 at Midway. The record coolest high of 65 occurred in 1940 at the University of Chicago. 19 of the last 33 lows (58%) were in the 60s. Nine lows (27%) were in the cold 50s and five lows (15%) were in the warm 70s. 1964 was O'Hare's coolest July 12th as the high was 69 (O'Hare's coolest high of the date) with a low of 52 (along with the low of 52 in 1965, O'Hare's coldest lows and colder than the record low of 53 set in 1999).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:55 and sunrise is at 5:28. Sunset is at 20:29 and twilight ends at 21:03. There's a total of 15 hours, 1 minute of daylight today and 16 hours, 8 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:55 and sunrise is at 5:29. The moon is waning crescent, having reached last quarter two nights ago at 20:48. Illumination was 39% at midnight, will be 34% at noon and 30% at midnight tonight. Moonrise was at 0:35 this morning. Moonset is at 15:00 this afternoon. Moonrise is at 1:08 tomorrow morning. Moonlight time is 14 hours, 25 minutes which is 28 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 ten days.
July 11: ORD
Today is July 11th. It's the 193rd day of the year. 173 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 84 and 63.
On the hot side, in 1980 (O'Hare's warmest July 11th) the high was 95 (O'Hare's hottest high of the date) with a low of 72. In 1987 the high was 91 with a low of 69. Our most recent 90s highs were 91 in 1987 and 90 in 1988. The record high of 97 and record warmest low of 80 were set on the same hot day back in 1936 at the University of Chicago. 28 of the past 33 highs (85%) were in the: 70s (10) and 80s (18). Five highs were in the hot 90s. All of the 90s highs (1979-2011) occurred from 1979 through 1988. O'Hare's second warmest July 11th was in 1972 as the high was 91 with a low of 75 (O'Hare's 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 1975 today (the 11th) and tomorrow (the 12th) the temperatures were the same: a high of 76 with a low of 56. In 1968 the high was 80 with a cold low of 50, a 30 degree spread. In 1965 the low was a cold 51 degrees. In 1963 the high was 88 with a low of 53, a 35 degree spread. In 1961 the high was 86 with a low of 55, a 31 degree spread.
More recently, there were additional large spreads of 30 degrees in 1994 (84/54) and 30 degrees in 1997 (84/54).
On the cool side, in 1996 (O'Hare's coolest July 11th) the high was 82 with the record low of 50, a 32 degree spread. The former record low was 51 in 1978 at Midway. In 1999 the high was 81 with a low of 52 (our most recent 50s low). O'Hare's coolest high of the date was 73 in 1990. The record coolest high of 65 occurred way back in 1873, at a time when the official readings were taken adjacent to Lake Michigan. 25 of the last 33 lows (76%) were in the 60s. There have been two amazing streaks of 60 degree lows: an eight year streak from 1986 through 1993 and then an 11 year streak from 2000 through 2010. 76% of the 60s lows (19/25) occurred in these two streaks. Six lows (18%) were in the cool 50s. Two lows (6%) were in the warm 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:54 and sunrise is at 5:28. Sunset is at 20:30 and twilight ends at 21:04. There's a total of 15 hours, 2 minutes of daylight today and 16 hours, 10 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:55 and sunrise is at 5:28. The moon is waning crescent, having reached last quarter last night at 20:48. Illumination was 48% at midnight, will be 44% at noon and 39% at midnight tonight. Moonrise was at 0:05 this morning. Moonset is at 14:02 this afternoon. Moonrise is at 0:35 tomorrow morning. Moonlight time is 13 hours, 57 minutes which is 55 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 11 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 85 and the normal low is 64. I've calculated the 33-year averages at 84 and 63.
On the hot side, in 1980 (O'Hare's warmest July 11th) the high was 95 (O'Hare's hottest high of the date) with a low of 72. In 1987 the high was 91 with a low of 69. Our most recent 90s highs were 91 in 1987 and 90 in 1988. The record high of 97 and record warmest low of 80 were set on the same hot day back in 1936 at the University of Chicago. 28 of the past 33 highs (85%) were in the: 70s (10) and 80s (18). Five highs were in the hot 90s. All of the 90s highs (1979-2011) occurred from 1979 through 1988. O'Hare's second warmest July 11th was in 1972 as the high was 91 with a low of 75 (O'Hare's 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 1975 today (the 11th) and tomorrow (the 12th) the temperatures were the same: a high of 76 with a low of 56. In 1968 the high was 80 with a cold low of 50, a 30 degree spread. In 1965 the low was a cold 51 degrees. In 1963 the high was 88 with a low of 53, a 35 degree spread. In 1961 the high was 86 with a low of 55, a 31 degree spread.
More recently, there were additional large spreads of 30 degrees in 1994 (84/54) and 30 degrees in 1997 (84/54).
On the cool side, in 1996 (O'Hare's coolest July 11th) the high was 82 with the record low of 50, a 32 degree spread. The former record low was 51 in 1978 at Midway. In 1999 the high was 81 with a low of 52 (our most recent 50s low). O'Hare's coolest high of the date was 73 in 1990. The record coolest high of 65 occurred way back in 1873, at a time when the official readings were taken adjacent to Lake Michigan. 25 of the last 33 lows (76%) were in the 60s. There have been two amazing streaks of 60 degree lows: an eight year streak from 1986 through 1993 and then an 11 year streak from 2000 through 2010. 76% of the 60s lows (19/25) occurred in these two streaks. Six lows (18%) were in the cool 50s. Two lows (6%) were in the warm 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:54 and sunrise is at 5:28. Sunset is at 20:30 and twilight ends at 21:04. There's a total of 15 hours, 2 minutes of daylight today and 16 hours, 10 minutes between twilights. We lost a minute of daylight from yesterday. Tomorrow twilight begins at 4:55 and sunrise is at 5:28. The moon is waning crescent, having reached last quarter last night at 20:48. Illumination was 48% at midnight, will be 44% at noon and 39% at midnight tonight. Moonrise was at 0:05 this morning. Moonset is at 14:02 this afternoon. Moonrise is at 0:35 tomorrow morning. Moonlight time is 13 hours, 57 minutes which is 55 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 11 days.
Wednesday, July 11, 2012
July 10, 2012
Today is July 10th. It's the 192nd day of the year. 174 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 63.
On the hot side, in 1989 (O'Hare's warmest July 10th) the high was 101 (a degree off the record) with a low of 73. Five years earlier, in 1984, the high was 99 with a low of 66, a 33 degree spread. Last year, in 2011, the high was 91 with a low of 74. The record high of 102 and record warmest low of 80 were set on the same hot day back in 1936 at the University of Chicago. The record high of 102 was originally set way back in 1901. 15 of the past 33 highs (46%) were in the 80s. Ten highs (30%) were in the hot: 90s (9) and 100s (1). Eight highs (24%) were in the cool 70s. O'Hare's second warmest July 10th was in 1976 as the high was 97 with a low of 76 (O'Hare's warmest low of the date). O'Hare also had a hot high of 97 in 1966.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1976 the high was 97 with a low of 76, a hot day. In 1968 the high was a cool 67 with a low of 53, a cool day. In 1966 the high was a hot 97 degrees. In 1965 the high was 80 with a cold low of 50 (equal to the record), a 30 degree spread. In 1963 the high was 83 with a cold low of 45 (lower than the record), a 38 degree spread. In 1962 the high was 84 with a cold low of 51 (just above the record), a 33 degree spread. In 1960 the high was a cool 72 degrees.
More recently, there were large spreads of 35 degrees in 1981 (91/56) and 31 degrees in 2005 (91/60).
On the cool side, in 1996 the high was 75 with the co-record low of 50. Three years later, in 1999, the high was 74 with a low of 54. Two years prior, in 1997, the high was 78 with the co-record low of 50. Another cool high was 73 degrees in 2006. The record coolest high of 62 occurred back in 1917, at a time when the official readings were taken adjacent to Lake Michigan. 24 of the last 33 lows (73%) were in the 60s. O'Hare recorded 11 consecutive 60s lows from 2000 through 2010. Seven lows (21%) were in the cold 50s. Two lows (6%) were in the warm 70s. Our most recent 50s low was 54 in 1999. O'Hare's coolest July 10th was in 1968 as the high was 67 (O'Hare's coolest high of the date) with a low of 53. O'Hare's coldest low of the date was 45 degrees in 1963.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:53 and sunrise is at 5:27. Sunset is at 20:30 and twilight ends at 21:04. There's a total of 15 hours, 3 minutes of daylight today and 16 hours, 11 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:54 and sunrise is at 5:28. The moon reaches last quarter tonight at 20:48. Illumination was 58% at midnight, will be 53% at noon and 48% at midnight tonight. Moonset is at 13:02 this afternoon. Moonrise is at 0:05 tomorrow morning. Moonset is at 14:02 tomorrow afternoon. Moonlight time is 13 hours, 2 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 12 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 85 and the normal low is 64. I've calculated the 33-year averages at 85 and 63.
On the hot side, in 1989 (O'Hare's warmest July 10th) the high was 101 (a degree off the record) with a low of 73. Five years earlier, in 1984, the high was 99 with a low of 66, a 33 degree spread. Last year, in 2011, the high was 91 with a low of 74. The record high of 102 and record warmest low of 80 were set on the same hot day back in 1936 at the University of Chicago. The record high of 102 was originally set way back in 1901. 15 of the past 33 highs (46%) were in the 80s. Ten highs (30%) were in the hot: 90s (9) and 100s (1). Eight highs (24%) were in the cool 70s. O'Hare's second warmest July 10th was in 1976 as the high was 97 with a low of 76 (O'Hare's warmest low of the date). O'Hare also had a hot high of 97 in 1966.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1976 the high was 97 with a low of 76, a hot day. In 1968 the high was a cool 67 with a low of 53, a cool day. In 1966 the high was a hot 97 degrees. In 1965 the high was 80 with a cold low of 50 (equal to the record), a 30 degree spread. In 1963 the high was 83 with a cold low of 45 (lower than the record), a 38 degree spread. In 1962 the high was 84 with a cold low of 51 (just above the record), a 33 degree spread. In 1960 the high was a cool 72 degrees.
More recently, there were large spreads of 35 degrees in 1981 (91/56) and 31 degrees in 2005 (91/60).
On the cool side, in 1996 the high was 75 with the co-record low of 50. Three years later, in 1999, the high was 74 with a low of 54. Two years prior, in 1997, the high was 78 with the co-record low of 50. Another cool high was 73 degrees in 2006. The record coolest high of 62 occurred back in 1917, at a time when the official readings were taken adjacent to Lake Michigan. 24 of the last 33 lows (73%) were in the 60s. O'Hare recorded 11 consecutive 60s lows from 2000 through 2010. Seven lows (21%) were in the cold 50s. Two lows (6%) were in the warm 70s. Our most recent 50s low was 54 in 1999. O'Hare's coolest July 10th was in 1968 as the high was 67 (O'Hare's coolest high of the date) with a low of 53. O'Hare's coldest low of the date was 45 degrees in 1963.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 4:53 and sunrise is at 5:27. Sunset is at 20:30 and twilight ends at 21:04. There's a total of 15 hours, 3 minutes of daylight today and 16 hours, 11 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 4:54 and sunrise is at 5:28. The moon reaches last quarter tonight at 20:48. Illumination was 58% at midnight, will be 53% at noon and 48% at midnight tonight. Moonset is at 13:02 this afternoon. Moonrise is at 0:05 tomorrow morning. Moonset is at 14:02 tomorrow afternoon. Moonlight time is 13 hours, 2 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 12 days.
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