Today is September 11th. It's the 254th day of the year. 111 days remain. It's week 37 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 75 and the normal low is 56. I've calculated the 30-year averages at 78 and 56.
On the hot side, in 2005 the high was 90 with a low of 69. Other warm highs were 88 in 1982, 87 in 1979, 87 in 1988, 87 in 1994 and 87 in 2000. The record high of 95 was set in 1952. The record warmest low of 73 occurred in 1961. Over the last 30 years, 25 highs were: 70s (13) and 80s (12). One high was in the warmer 90s. Four highs were in the cooler 60s.
In looking back through the years to the first September at O'Hare in 1959, the following instances were notable: in 1978 the high was 90 with a low of 66, a hot day. In 1976 the high was 84 with a low of 53, a 31 degree spread. In 1974 the high was 87 with a low of 69, a hot day. In 1967 the high was 71 with a low of 41, a 30 degree spread. That low of 41 is cooler than the record low. In 1966 the high was 86 with a low of 49, a 37 degree spread. In 1962 the high was 80 with a low of 47, a 33 degree spread. In 1961 the high was 89 with a low of 68, a hot day.
More recently, there were large spreads of 35 degrees in 1999 (81/46) and 30 degrees in 1988 (87/57). There was a small spread of seven degrees in 1991 (71/64).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest lows were the five in the 40s. The coolest of these was the record low of 42 in 1993. The coolest highs were the four in the 60s. The coolest were 67 in both 1985 and three years ago. The record coolest high of 61 occurred in 1940, a time when the official readings were taken on the lakefront. Over the last 30 years, 25 lows were: 50s (15) and 60s (10). Five lows were in the cooler 40s. No lows were in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:01 and sunrise is at 6:29. Sunset is at 19:10 and twilight ends at 19:38. Tomorrow twilight begins at 6:02 and sunrise is at 6:30. There's a total of 12 hours, 41 minutes of daylight today (two minutes less than yesterday) and 13 hours, 37 minutes between twilights. The moon reaches last quarter tonight at 21:16. Illumination was 59% at midnight, will be 54% at noon and 48% at midnight tonight. Moonset is at 14:09 this afternoon. Moonrise is at 23:00 tonight. Moonlight time is 15 hours, 9 minutes which is 11 minutes longer than yesterday.
Patriot Day is today. It's the 8th anniversary of the 9/11 attacks on America. My oldest sister, Mary Ann, and her husband, William, celebrate their 7th wedding anniversary in two days. Grandparent's Day is also in two days. Maria, my second youngest sister, and her husband, Buddy, celebrate their 8th wedding anniversary in three days. Citizenship Day is in six days. The autumnal equinox is in 11 days. -Bernie-
Unless noted, the following data is based upon observations collected by the National Weather Service, Chicago, at O'Hare International Airport (ORD) between November 1978 and last year. ORD has been the official site of record for Chicago since Thursday, January 17, 1980.
According to the National Climatic Data Center (NCDC), the normal high is 75 and the normal low is 56. I've calculated the 30-year averages at 78 and 56.
On the hot side, in 2005 the high was 90 with a low of 69. Other warm highs were 88 in 1982, 87 in 1979, 87 in 1988, 87 in 1994 and 87 in 2000. The record high of 95 was set in 1952. The record warmest low of 73 occurred in 1961. Over the last 30 years, 25 highs were: 70s (13) and 80s (12). One high was in the warmer 90s. Four highs were in the cooler 60s.
In looking back through the years to the first September at O'Hare in 1959, the following instances were notable: in 1978 the high was 90 with a low of 66, a hot day. In 1976 the high was 84 with a low of 53, a 31 degree spread. In 1974 the high was 87 with a low of 69, a hot day. In 1967 the high was 71 with a low of 41, a 30 degree spread. That low of 41 is cooler than the record low. In 1966 the high was 86 with a low of 49, a 37 degree spread. In 1962 the high was 80 with a low of 47, a 33 degree spread. In 1961 the high was 89 with a low of 68, a hot day.
More recently, there were large spreads of 35 degrees in 1999 (81/46) and 30 degrees in 1988 (87/57). There was a small spread of seven degrees in 1991 (71/64).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest lows were the five in the 40s. The coolest of these was the record low of 42 in 1993. The coolest highs were the four in the 60s. The coolest were 67 in both 1985 and three years ago. The record coolest high of 61 occurred in 1940, a time when the official readings were taken on the lakefront. Over the last 30 years, 25 lows were: 50s (15) and 60s (10). Five lows were in the cooler 40s. No lows were in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:01 and sunrise is at 6:29. Sunset is at 19:10 and twilight ends at 19:38. Tomorrow twilight begins at 6:02 and sunrise is at 6:30. There's a total of 12 hours, 41 minutes of daylight today (two minutes less than yesterday) and 13 hours, 37 minutes between twilights. The moon reaches last quarter tonight at 21:16. Illumination was 59% at midnight, will be 54% at noon and 48% at midnight tonight. Moonset is at 14:09 this afternoon. Moonrise is at 23:00 tonight. Moonlight time is 15 hours, 9 minutes which is 11 minutes longer than yesterday.
Patriot Day is today. It's the 8th anniversary of the 9/11 attacks on America. My oldest sister, Mary Ann, and her husband, William, celebrate their 7th wedding anniversary in two days. Grandparent's Day is also in two days. Maria, my second youngest sister, and her husband, Buddy, celebrate their 8th wedding anniversary in three days. Citizenship Day is in six days. The autumnal equinox is in 11 days. -Bernie-
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