Today is May 27th. It's the 147th day of the year. 218 days remain. It's week 21 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 73 and the normal low is 51. I've calculated the 31-year averages at 72 and 50.
On the warm side, in 1987 the high was 88 with a low of 68. Four years later, in 1991, the high was 88 with a low of 66. These lows in the 60s were the only lows in the 60s. Other 80s highs of note were 87 in 2006 and 85 in 1980. Rounding out the highs in the 80s, it was 84 in 1988, 83 in 1998 and 81 in 1999. The record high of 94 and record warmest low of 75 were set on the same day back in 1911. 29 of the last 31 highs (94%) were: 60s (12), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1978 the high was 88 with a low of 66, a hot day. In 1976 the high was 77 with a low of 46, a 31 degree spread. In 1971 the low was a cold 38. In 1969 the high was 87 with a low of 63, a hot day. In 1968 the high was a cool 61 with a low of 54, a seven degree spread. In 1966 the high was a warm 85 with a low of 54, a 31 degree spread. In 1963 the high was a cool 60. In 1962 the high was a cool 59. In 1961 the high was 70 with a cold low of 34, a 36 degree spread. In 1959 the high was 83 with a warm low of 66, a warm day.
More recently, there was a small spread of six degrees in 1996 (54/48). There were large spreads of 35 degrees in 1999 (81/46), 33 degrees in 1980 (85/52), 33 degrees in 1998 (83/50) and 32 degrees in 1994 (67/35).
On the cool side, two years ago the high was 50 with a low of 42. In 1992 the high was 63 with the record low of 33, a 30 degree spread. The other 30s low was 35 in 1994. These were the only 30s lows, only two years apart. Other cool lows were 54 in 1996 and 61 in 2001. The record coolest high of 49 was set way back in 1895. 27 of the last 31 lows (87%) were: 40s (15) and 50s (12). Two lows were in the colder 30s and two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:49 and sunrise was at 5:22. Sunset is at 20:19 and twilight ends at 20:53. There's a total of 14 hours, 57 minutes of daylight today and 16 hours, 4 minutes between twilights. Tomorrow twilight begins at 4:48 and sunrise is at 5:22. The moon is full today, reaching the full Flower moon 18:07. Illumination was 99% at midnight, will be 100% at noon and 100% at midnight tonight. Moonset was at 4:45 this morning. Moonrise is at 20:32 this evening. Moonset is 5:33 tomorrow morning. Moonlight time is 8 hours, 13 minutes which is 23 minutes shorter than yesterday.
Memorial Day is in four 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 73 and the normal low is 51. I've calculated the 31-year averages at 72 and 50.
On the warm side, in 1987 the high was 88 with a low of 68. Four years later, in 1991, the high was 88 with a low of 66. These lows in the 60s were the only lows in the 60s. Other 80s highs of note were 87 in 2006 and 85 in 1980. Rounding out the highs in the 80s, it was 84 in 1988, 83 in 1998 and 81 in 1999. The record high of 94 and record warmest low of 75 were set on the same day back in 1911. 29 of the last 31 highs (94%) were: 60s (12), 70s (10) and 80s (7). Two highs were in the cooler 50s.
In looking back through the years to the first May at O'Hare in 1959, the following instances were notable: In 1978 the high was 88 with a low of 66, a hot day. In 1976 the high was 77 with a low of 46, a 31 degree spread. In 1971 the low was a cold 38. In 1969 the high was 87 with a low of 63, a hot day. In 1968 the high was a cool 61 with a low of 54, a seven degree spread. In 1966 the high was a warm 85 with a low of 54, a 31 degree spread. In 1963 the high was a cool 60. In 1962 the high was a cool 59. In 1961 the high was 70 with a cold low of 34, a 36 degree spread. In 1959 the high was 83 with a warm low of 66, a warm day.
More recently, there was a small spread of six degrees in 1996 (54/48). There were large spreads of 35 degrees in 1999 (81/46), 33 degrees in 1980 (85/52), 33 degrees in 1998 (83/50) and 32 degrees in 1994 (67/35).
On the cool side, two years ago the high was 50 with a low of 42. In 1992 the high was 63 with the record low of 33, a 30 degree spread. The other 30s low was 35 in 1994. These were the only 30s lows, only two years apart. Other cool lows were 54 in 1996 and 61 in 2001. The record coolest high of 49 was set way back in 1895. 27 of the last 31 lows (87%) were: 40s (15) and 50s (12). Two lows were in the colder 30s and two lows were in the warmer 60s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight began at 4:49 and sunrise was at 5:22. Sunset is at 20:19 and twilight ends at 20:53. There's a total of 14 hours, 57 minutes of daylight today and 16 hours, 4 minutes between twilights. Tomorrow twilight begins at 4:48 and sunrise is at 5:22. The moon is full today, reaching the full Flower moon 18:07. Illumination was 99% at midnight, will be 100% at noon and 100% at midnight tonight. Moonset was at 4:45 this morning. Moonrise is at 20:32 this evening. Moonset is 5:33 tomorrow morning. Moonlight time is 8 hours, 13 minutes which is 23 minutes shorter than yesterday.
Memorial Day is in four days. - Bernie -
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