Today is September 3rd. It's the 246th day of the year. 119 days remain. It's week 36 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 78 and the normal low is 58. I've calculated the 30-year averages at 80 and 60.
On the hot side, in 1985 the high was 88 with a low of 72. Other hot highs were 91 in 1983, 90 in 1999 and 88 two years ago. The record high of 97 was set in 1953. The record warmest low of 75 occurred in 1973. Over the last 30 years, 25 highs were: 70s (9) and 80s (16). Two highs were in the warmer 90s. Three 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 1974 the high was 64 with a low of 46, a cool day. That low of 46 was cooler than the record low. In 1973 the high was 92 with a low of 70, a hot day. In 1971 the high was 87 with a low of 73, a hot day. In 1968 the high was 88. In 1967 the high was 76 with a low of 44, a 32 degree spread. That low of 44 was cooler than the record low. In 1966 the high was 89. In 1964 the high was 94 with a low of 67, a hot day. In 1960 the high was 96 with a low of 72, a hot day.
More recently, there was a large spread of 31 degrees in 1983 (91/60). There was a small spread of six degrees in 1981 (66/60).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest highs were the three 60s: 66 in 1981, 67 in 1997 and 68 in 1994. The lowest temperatures were the two 40s: 48 in 1982 and 49 in 1987. The record low of 47 was set back in 1974. The record coolest high of 59 occurred way back in 1891. Over the last 30 years, 27 lows were: 50s (12) and 60s (15). Two lows were in the cooler 40s and one low was in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight is at 5:52 and sunrise is at 6:21. Sunset is at 19:23 and twilight ends at 19:52. Tomorrow twilight begins at 5:53 and sunrise is at 6:22. There's a total of 13 hours, 2 minutes of daylight today (three minutes less than yesterday) and 14 hours between twilights. The moon is waxing gibbous, heading towards the full Corn moon tomorrow at 11:03. Illumination was 98% at midnight, will be 99% at noon and 100% at midnight tonight. Moonset is at 5:18 this morning. Moonrise is at 18:47 tonight. Moonset is at 6:21 tomorrow morning. Moonlight time is 10 hours, 31 minutes which is 40 minutes longer than yesterday.
Labor Day is in four days. Patriot Day is in eight days. The autumnal equinox is in 19 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 78 and the normal low is 58. I've calculated the 30-year averages at 80 and 60.
On the hot side, in 1985 the high was 88 with a low of 72. Other hot highs were 91 in 1983, 90 in 1999 and 88 two years ago. The record high of 97 was set in 1953. The record warmest low of 75 occurred in 1973. Over the last 30 years, 25 highs were: 70s (9) and 80s (16). Two highs were in the warmer 90s. Three 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 1974 the high was 64 with a low of 46, a cool day. That low of 46 was cooler than the record low. In 1973 the high was 92 with a low of 70, a hot day. In 1971 the high was 87 with a low of 73, a hot day. In 1968 the high was 88. In 1967 the high was 76 with a low of 44, a 32 degree spread. That low of 44 was cooler than the record low. In 1966 the high was 89. In 1964 the high was 94 with a low of 67, a hot day. In 1960 the high was 96 with a low of 72, a hot day.
More recently, there was a large spread of 31 degrees in 1983 (91/60). There was a small spread of six degrees in 1981 (66/60).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest highs were the three 60s: 66 in 1981, 67 in 1997 and 68 in 1994. The lowest temperatures were the two 40s: 48 in 1982 and 49 in 1987. The record low of 47 was set back in 1974. The record coolest high of 59 occurred way back in 1891. Over the last 30 years, 27 lows were: 50s (12) and 60s (15). Two lows were in the cooler 40s and one low was in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight is at 5:52 and sunrise is at 6:21. Sunset is at 19:23 and twilight ends at 19:52. Tomorrow twilight begins at 5:53 and sunrise is at 6:22. There's a total of 13 hours, 2 minutes of daylight today (three minutes less than yesterday) and 14 hours between twilights. The moon is waxing gibbous, heading towards the full Corn moon tomorrow at 11:03. Illumination was 98% at midnight, will be 99% at noon and 100% at midnight tonight. Moonset is at 5:18 this morning. Moonrise is at 18:47 tonight. Moonset is at 6:21 tomorrow morning. Moonlight time is 10 hours, 31 minutes which is 40 minutes longer than yesterday.
Labor Day is in four days. Patriot Day is in eight days. The autumnal equinox is in 19 days. -Bernie-
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