Today is April 10th. It's the 100th day of the year. 265 days remain. It's week 15 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 56 and the normal low is 36. I've calculated the 31-year averages at 54 and 34.
On the warm side, in 2005 the high was 79 with a low of 44, a 35 degree spread. In 1981 the high was 69 with a low of 50. Six years later, in 1987, the high was 74 with a low of 45. In 1992 the high was 69 with a low of 46. Another warm high was 71 in 2006. The record high of 90 was set back in 1930. The record warmest low of 55 was set back in 1945. 23 of the last 31 highs were: 40s (11) and 50s (12). On the warmer side, eight highs were: 60s (5) and 70s (3).
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 85 with a low of 50, a 35 degree spread and warm day. In 1976 the high was a warm 72 with a low of 37, a 35 degree spread. In 1975 the high was a cold 55. In 1973 the high was a cold 35 with a low of 28, a seven degree spread and cold! In 1971 the high was a warm 69 with a low of 32, a 37 degree spread. In 1966 the low was a cold 24. In 1960 the low was also a cold 24. In 1959 the high was a cold 38 with a low of 28, a cold day.
More recently, we had a small spread of seven degrees in 2000 (40/33). The large spreads were 37 degrees three years ago (71/34), 32 degrees in 1996 (62/30), 32 degrees in 2003 (58/26), 31 degrees in 1986 (60/29) and 30 degrees in 2002 (64/34).
On the cold side, in 1989 the high was 40 with the record low of 18. In 1997 the high was 40 with a low of 21. In 1980 the high was 40 with a low of 29. Other cold highs were 40 in 2000, 41 in 1995, 43 in 1982 and 44 in 1983. The record coldest high of 32 was set way back in 1892. 16 of the last 31 lows were 30s. Nine lows were in the colder: 10s (a.k.a. teens)(1) and 20s (8). Six lows were in the warmer: 40s (5) and 50s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 5:52 and sunrise was at 6:21. Sunset is at 19:29 and twilight ends at 19:58. There's a total of 13 hours, 8 minutes of daylight today and 14 hours, 6 minutes between twilights. Tomorrow twilight begins at 5:50 and sunrise is at 6:19. The moon is waning crescent. Illumination was 17% at midnight, will be 13% at noon and 10% at midnight tonight. Moonrise was at 4:21 this morning. Moonset is at 16:00. Moonrise is at 4:43 tomorrow morning. Moonlight time is 11 hours, 39 minutes which is 39 minutes longer than yesterday.
National Tax Freedom Day was yesterday. Illinois Tax Freedom Day is tomorrow.
- 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 56 and the normal low is 36. I've calculated the 31-year averages at 54 and 34.
On the warm side, in 2005 the high was 79 with a low of 44, a 35 degree spread. In 1981 the high was 69 with a low of 50. Six years later, in 1987, the high was 74 with a low of 45. In 1992 the high was 69 with a low of 46. Another warm high was 71 in 2006. The record high of 90 was set back in 1930. The record warmest low of 55 was set back in 1945. 23 of the last 31 highs were: 40s (11) and 50s (12). On the warmer side, eight highs were: 60s (5) and 70s (3).
In looking back through the years to the first April at O'Hare in 1959, the following instances were notable: In 1977 the high was 85 with a low of 50, a 35 degree spread and warm day. In 1976 the high was a warm 72 with a low of 37, a 35 degree spread. In 1975 the high was a cold 55. In 1973 the high was a cold 35 with a low of 28, a seven degree spread and cold! In 1971 the high was a warm 69 with a low of 32, a 37 degree spread. In 1966 the low was a cold 24. In 1960 the low was also a cold 24. In 1959 the high was a cold 38 with a low of 28, a cold day.
More recently, we had a small spread of seven degrees in 2000 (40/33). The large spreads were 37 degrees three years ago (71/34), 32 degrees in 1996 (62/30), 32 degrees in 2003 (58/26), 31 degrees in 1986 (60/29) and 30 degrees in 2002 (64/34).
On the cold side, in 1989 the high was 40 with the record low of 18. In 1997 the high was 40 with a low of 21. In 1980 the high was 40 with a low of 29. Other cold highs were 40 in 2000, 41 in 1995, 43 in 1982 and 44 in 1983. The record coldest high of 32 was set way back in 1892. 16 of the last 31 lows were 30s. Nine lows were in the colder: 10s (a.k.a. teens)(1) and 20s (8). Six lows were in the warmer: 40s (5) and 50s (1).
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 5:52 and sunrise was at 6:21. Sunset is at 19:29 and twilight ends at 19:58. There's a total of 13 hours, 8 minutes of daylight today and 14 hours, 6 minutes between twilights. Tomorrow twilight begins at 5:50 and sunrise is at 6:19. The moon is waning crescent. Illumination was 17% at midnight, will be 13% at noon and 10% at midnight tonight. Moonrise was at 4:21 this morning. Moonset is at 16:00. Moonrise is at 4:43 tomorrow morning. Moonlight time is 11 hours, 39 minutes which is 39 minutes longer than yesterday.
National Tax Freedom Day was yesterday. Illinois Tax Freedom Day is tomorrow.
- Bernie -
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