Today is August 4th. It's the 216th day of the year. 149 days remain. It's week 31 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 83 and 66.
On the hot side, in 1988 the high was 97 (our most recent 90s high) with the record warmest low of 78. In 2005 the high was 88 with a low of 76. The other 90s highs were 93 in 1980 and 90 in 1984. Other warm lows were 74 in both 1982 and two decades later in 2002. The record high of 100 was set in 1947. 21 of the past 32 highs (66%) were in the 80s. Three highs (9%) were in the hot 90s. Eight highs (25%) were in the cool 70s. Our most recent 70s high was 74 in 2004. For the past 22 years (1989-2010), there have been no highs in the 90s. It did hit 89 three times during this time (in 1989, 2002 and 2006).
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1978 the low was a cold 49, a temperature colder than the record low. In 1974 the high was a cool 70 degrees. 1970 and 1971 had cool highs of 71 degrees. In 1966 the high was 81 with a cold low of 48, a 33 degree spread. That low of 48 was colder than the record low.
More recently, there was a small spread of four degrees in 1998 (72/68).
Three years ago O'Hare recorded 2.43 inches of rain and Rockford had 1.22 inches. I noted that I hadn't seen lightning as severe as this in a long time. This was at the Crystal Lake train depot parking lot.
On the cool side, in 1992 the high was 72 with the record low of 53. That low of 53 was originally set way back in 1880 and tied way back in 1894. The next year, 1993, saw a high of 73 with a low of 54, just a degree above the record. Our most recent 50s low (54) occurred in 2000. In 1985 the high was 72 with a low of 56. The only other high of 72 (the coolest) occurred in 1998. The record coolest high of 62 was set back in 1915. The official thermometer was located near Lake Michigan at the time. 19 of the last 32 lows (59%) were in the 60s. Six lows (19%) were in the cool 50s. Seven lows (22%) were in the warm 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:18 and sunrise is at 5:49. Sunset is at 20:09 and twilight ends at 20:41. There's a total of 14 hours, 20 minutes of daylight today and 15 hours, 23 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 5:19 and sunrise is at 5:50. The moon is waxing crescent and will reach first quarter in two days at 6:08. Illumination was 26% at midnight, will be 31% at noon and 36% at midnight tonight. Moonrise is at 11:47 this morning. Moonset is at 22:34 tonight. Moonrise is at 13:00 tomorrow afternoon. Moonlight time is 10 hours, 47 minutes which is 42 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 32 days.
Friday, August 5, 2011
Wednesday, August 3, 2011
August 3: ORD
Today is August 3rd. It's the 215th day of the year. 150 days remain. It's week 31 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 86 and 64.
On the hot side, in 1988 the high was 96 with the record warmest low of 80. In 2005 the high was 93 with a low of 74. In 1987 the high was 96 with a low of 70. In 1982 the high was 95 with a low of 68. Another hot high was 96 in 1983. The record high of 98 was set in 1964 at Midway. The record high of 98 was originally set in 1930 and tied again in 1944. 18 of the past 32 highs (56%) were in the 80s. Ten highs (31%) were in the hot 90s. Four highs (13%) were in the cool 70s. From 1979-2010, this is the average ninth hottest day of the year.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1976 the high was 80 with a cold low of 49, a 31 degree spread. In 1972 the high was a cool 71 degrees. In 1966 the high was 77 with a cold low of 48, a cool day. That low of 48 equals the record low. In 1965 the high was 75 with a cool low of 50, a cool day. In 1964 the high was 96 with a low of 76, a hot day and year of the record high of 98 at Midway.
More recently, there was a large spread of 34 degrees in 1983 (96/62), 32 degrees in 1994 (88/56) and 31 degrees in 2002 (90/59). There was a small spread of seven degrees in 1995 (78/71).
On the cool side, in 2000 the high was 72 (the coolest high of the past 31 years) with a low of 54. In 1985 the high was 81 with a low of 50. In 1992 the high was 76 with a low of 56. The other 70s highs were 78 in 1995 and 79 in 2003. The record low of 48 and record coolest high of 62 occurred on the same cool day way back in 1894. The official thermometer was located near Lake Michigan at the time. 18 of the last 32 lows (56%) were in the 60s. Eight lows (25%) were in the cool 50s, most recently 59 in 2002. Six lows (19%) were in the warm: 70s (5) and 80s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:16 and sunrise is at 5:48. Sunset is at 20:10 and twilight ends at 20:42. There's a total of 14 hours, 22 minutes of daylight today and 15 hours, 26 minutes between twilights. We lost three minutes of daylight from yesterday. Tomorrow twilight begins at 5:18 and sunrise is at 5:49. The moon is waxing crescent and will reach first quarter in three days at 6:08. Illumination was 16% at midnight, will be 21% at noon and 26% at midnight tonight. Moonrise is at 10:33 this morning. Moonset is at 22:02 tonight. Moonrise is at 11:47 tomorrow morning. Moonlight time is 11 hours, 29 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 33 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.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 86 and 64.
On the hot side, in 1988 the high was 96 with the record warmest low of 80. In 2005 the high was 93 with a low of 74. In 1987 the high was 96 with a low of 70. In 1982 the high was 95 with a low of 68. Another hot high was 96 in 1983. The record high of 98 was set in 1964 at Midway. The record high of 98 was originally set in 1930 and tied again in 1944. 18 of the past 32 highs (56%) were in the 80s. Ten highs (31%) were in the hot 90s. Four highs (13%) were in the cool 70s. From 1979-2010, this is the average ninth hottest day of the year.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1976 the high was 80 with a cold low of 49, a 31 degree spread. In 1972 the high was a cool 71 degrees. In 1966 the high was 77 with a cold low of 48, a cool day. That low of 48 equals the record low. In 1965 the high was 75 with a cool low of 50, a cool day. In 1964 the high was 96 with a low of 76, a hot day and year of the record high of 98 at Midway.
More recently, there was a large spread of 34 degrees in 1983 (96/62), 32 degrees in 1994 (88/56) and 31 degrees in 2002 (90/59). There was a small spread of seven degrees in 1995 (78/71).
On the cool side, in 2000 the high was 72 (the coolest high of the past 31 years) with a low of 54. In 1985 the high was 81 with a low of 50. In 1992 the high was 76 with a low of 56. The other 70s highs were 78 in 1995 and 79 in 2003. The record low of 48 and record coolest high of 62 occurred on the same cool day way back in 1894. The official thermometer was located near Lake Michigan at the time. 18 of the last 32 lows (56%) were in the 60s. Eight lows (25%) were in the cool 50s, most recently 59 in 2002. Six lows (19%) were in the warm: 70s (5) and 80s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:16 and sunrise is at 5:48. Sunset is at 20:10 and twilight ends at 20:42. There's a total of 14 hours, 22 minutes of daylight today and 15 hours, 26 minutes between twilights. We lost three minutes of daylight from yesterday. Tomorrow twilight begins at 5:18 and sunrise is at 5:49. The moon is waxing crescent and will reach first quarter in three days at 6:08. Illumination was 16% at midnight, will be 21% at noon and 26% at midnight tonight. Moonrise is at 10:33 this morning. Moonset is at 22:02 tonight. Moonrise is at 11:47 tomorrow morning. Moonlight time is 11 hours, 29 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 33 days.
August 2: ORD
Today is August 2nd. It's the 214th day of the year. 151 days remain. It's week 31 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 85 and 64.
On the hot side, in 1988 the high was the former record high of 100 with the record warmest low of 79. In 2006 the high was 97 with a low of 77. In 1987 the high was 96 with a low of 74. In 1991 the high was the record high of 101 with a low of 67, a 34 degree spread. 17 of the past 32 highs (53%) were in the 80s. Eight highs (25%) were in the hot: 90s (6) and 100s (2). Seven highs (22%) were in the cool 70s.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1975 the high was 78 with a low of 73, a five degree spread. In 1966 the high was 71 with a low of 52, a cool day. In 1965 the high was 73 with a cold low of 49, a cool day. That low of 49 is colder than the record low. In 1964 the high was 96 with a low of 76, a hot day. In 1962 the high was 83 with a low of 53, a 30 degree spread.
More recently, there were no other large or small spreads.
On the cool side, in 1985 the high was 77 with the record low of 51. In 1994 the high was 77 with a low of 56. Another of our coolest highs of 77 occurred in 1996. The record coolest high of 63 occurred back in 1927. The official thermometer was located near Lake Michigan at the time. 17 of the last 32 lows (53%) were in the 60s. Nine lows (28%) were in the cool 50s. Six lows (19%) were in the warm 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:15 and sunrise is at 5:47. Sunset is at 20:12 and twilight ends at 20:43. There's a total of 14 hours, 25 minutes of daylight today and 15 hours, 28 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 5:16 and sunrise is at 5:48. The moon is waxing crescent, having become new three days ago at 13:40. Illumination was 8% at midnight, will be 12% at noon and 16% at midnight tonight. Moonrise is at 9:19 this morning. Moonset is at 21:32 tonight. Moonrise is at 10:33 tomorrow morning. Moonlight time is 12 hours, 13 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 34 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.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 85 and 64.
On the hot side, in 1988 the high was the former record high of 100 with the record warmest low of 79. In 2006 the high was 97 with a low of 77. In 1987 the high was 96 with a low of 74. In 1991 the high was the record high of 101 with a low of 67, a 34 degree spread. 17 of the past 32 highs (53%) were in the 80s. Eight highs (25%) were in the hot: 90s (6) and 100s (2). Seven highs (22%) were in the cool 70s.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1975 the high was 78 with a low of 73, a five degree spread. In 1966 the high was 71 with a low of 52, a cool day. In 1965 the high was 73 with a cold low of 49, a cool day. That low of 49 is colder than the record low. In 1964 the high was 96 with a low of 76, a hot day. In 1962 the high was 83 with a low of 53, a 30 degree spread.
More recently, there were no other large or small spreads.
On the cool side, in 1985 the high was 77 with the record low of 51. In 1994 the high was 77 with a low of 56. Another of our coolest highs of 77 occurred in 1996. The record coolest high of 63 occurred back in 1927. The official thermometer was located near Lake Michigan at the time. 17 of the last 32 lows (53%) were in the 60s. Nine lows (28%) were in the cool 50s. Six lows (19%) were in the warm 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:15 and sunrise is at 5:47. Sunset is at 20:12 and twilight ends at 20:43. There's a total of 14 hours, 25 minutes of daylight today and 15 hours, 28 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 5:16 and sunrise is at 5:48. The moon is waxing crescent, having become new three days ago at 13:40. Illumination was 8% at midnight, will be 12% at noon and 16% at midnight tonight. Moonrise is at 9:19 this morning. Moonset is at 21:32 tonight. Moonrise is at 10:33 tomorrow morning. Moonlight time is 12 hours, 13 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 34 days.
Monday, August 1, 2011
August 1: ORD
Today is August 1st. It's the 213th day of the year. 152 days remain. It's week 31 of the year.
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 86 and 65.
On the hot side, in 2006 the high was 99 with the record warmest low (and only 80s low) of 80. In 1988 the high was the record high of 100 with the former record warmest low of 78. In 1987 the high was 97 with a low of 77. Other hot highs were 95 in 1991 and 94 in 2002. Other warm lows were 76 in 2001 and 75 in 2002 (our most recent 70s low). 17 of the past 32 highs (53%) were in the 80s. Nine highs (28%) were in the hot: 90s (8) and 100s (1). Six highs (19%) were in the cool 70s. An interesting side bar is that for nine years in a row, from 1992 to 2000, there were no highs in the 90s. From 1979-2010, this is the average fifth hottest day of the year.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1974 the high was a cool 67 with a low of 62, a five degree spread. In 1973 the high was a cool 70 degrees. In 1965 the high was a cool 69 with a low of 54, a cool day. In 1961 the high was 77 with a low of 71, a six degree spread.
More recently, there was a large spread of 32 degrees in 1991 (95/63).
On the cool side, in 1990 the high was 76 with the record low of 51. The former record low was 52 in 1947. In 1985 the high was 75 with a low of 54. In 1979 we had our coolest high (of the past 32 years) of 70 with a low of 60. The record coolest high of 66 occurred way back in 1875. The official thermometer was located near Lake Michigan at the time. 20 of the last 32 lows (62%) were in the 60s, including seven of the last eight lows (88%). Six lows (19%) were in the cool 50s. Our most recent 50s low was 57 in 1996. Six lows (19%) were in the warm: 70s (5) and 80s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:14 and sunrise is at 5:46. Sunset is at 20:13 and twilight ends at 20:44. There's a total of 14 hours, 27 minutes of daylight today and 15 hours, 30 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 5:15 and sunrise is at 5:47. The moon is waxing crescent, having become new two days ago at 13:40. Illumination was 3% at midnight, will be 5% at noon and 8% at midnight tonight. Moonrise is at 8:05 this morning. Moonset is at 21:02 tonight. Moonrise is at 9:19 tomorrow morning. Moonlight time is 12 hours, 57 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 35 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.
According to the National Climatic Data Center (NCDC), the normal high is 83 and the normal low is 64. I've calculated the 32-year averages at 86 and 65.
On the hot side, in 2006 the high was 99 with the record warmest low (and only 80s low) of 80. In 1988 the high was the record high of 100 with the former record warmest low of 78. In 1987 the high was 97 with a low of 77. Other hot highs were 95 in 1991 and 94 in 2002. Other warm lows were 76 in 2001 and 75 in 2002 (our most recent 70s low). 17 of the past 32 highs (53%) were in the 80s. Nine highs (28%) were in the hot: 90s (8) and 100s (1). Six highs (19%) were in the cool 70s. An interesting side bar is that for nine years in a row, from 1992 to 2000, there were no highs in the 90s. From 1979-2010, this is the average fifth hottest day of the year.
In looking back through the years to the first August at O'Hare in 1959, the following instances were notable: In 1974 the high was a cool 67 with a low of 62, a five degree spread. In 1973 the high was a cool 70 degrees. In 1965 the high was a cool 69 with a low of 54, a cool day. In 1961 the high was 77 with a low of 71, a six degree spread.
More recently, there was a large spread of 32 degrees in 1991 (95/63).
On the cool side, in 1990 the high was 76 with the record low of 51. The former record low was 52 in 1947. In 1985 the high was 75 with a low of 54. In 1979 we had our coolest high (of the past 32 years) of 70 with a low of 60. The record coolest high of 66 occurred way back in 1875. The official thermometer was located near Lake Michigan at the time. 20 of the last 32 lows (62%) were in the 60s, including seven of the last eight lows (88%). Six lows (19%) were in the cool 50s. Our most recent 50s low was 57 in 1996. Six lows (19%) were in the warm: 70s (5) and 80s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:14 and sunrise is at 5:46. Sunset is at 20:13 and twilight ends at 20:44. There's a total of 14 hours, 27 minutes of daylight today and 15 hours, 30 minutes between twilights. We lost two minutes of daylight from yesterday. Tomorrow twilight begins at 5:15 and sunrise is at 5:47. The moon is waxing crescent, having become new two days ago at 13:40. Illumination was 3% at midnight, will be 5% at noon and 8% at midnight tonight. Moonrise is at 8:05 this morning. Moonset is at 21:02 tonight. Moonrise is at 9:19 tomorrow morning. Moonlight time is 12 hours, 57 minutes which is 44 minutes shorter than yesterday.
Summer began June 4 and runs for 110 days through September 21. High temperatures in this period are usually in the 70s and 80s. Highs in the 60s, 90s and 100s occur infrequently. Labor Day is in 35 days.
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