Tuesday, October 20, 2009

October 12: ORD

Today is October 12th. It's the 285th day of the year. 80 days remain. It's week 41 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 64 and the normal low is 43. I've calculated the 30-year averages at 65 and 43.


On the warm side, last year the high was the co-record high of 84 with a low of 57. The other co-record high of 84 was set in 1960. In 1997 the high was 82 with a low of 58. Two years earlier, in 1995, the high was 83 with a low of 55. Another warm high was 76 in 1985. Another warm low was 55 in 2005.
The record warmest low of 67 occurred back in 1928. Over the last 30 years, 25 highs have been: 50s (6), 60s (11) and 70s (8). Three highs were in the warmer 80s. Two highs were in the cooler: 30s (1) and 40s (1).

In looking back through the years to the first October at O'Hare in 1959, the following instances were notable: in 1976 the high was 79 with a low of 57, a warm day. In 1975 the high was 76 with a low of 41, a 35 degree spread. In 1973 the high was 74 with a low of 61, a warm day. In 1971 the high was 70 with a low of 39, a 31 degree spread. In 1969 the high was 61 with a low of 54, a seven degree spread. In 1968 the high was 75 with a low of 44, a 31 degree spread. In 1967 the high was 63 with a cold low of 28, a 35 degree spread. In 1966 the high was 65 with a cold low of 31, a 34 degree spread. In 1962 the high was a warm 76 degrees. In 1961 the high was 78 with a low of 45, a 33 degree spread. In 1960 the high was 82 with a low of 53, a
warm day.

More recently, there were
large spreads of 32 degrees in 1990 (64/32), 32 degrees in 1994 (67/35), 31 degrees in 1987 (59/28) and 30 degrees in 2000 (73/43). There were no small spreads of up to seven degrees.

2006 was the new earliest date for snow, breaking October 18 in 1972 and 1989. O'Hare and Midway had 0.3 inches. DeKalb had half an inch. Crystal Lake and Algonquin recorded an inch. Arlington Heights reported an inch and a half.

On the cool side, in 2006 the high was 39 with a low of 30. In 1988 the high was 48 with the record low of 28. In 1980 the high was 53 with a low of 31. Another cool high was 51 in 1979. Another cool low was 28 in 1987. The record coolest high of 38 occurred back in 1917. 28 of the last 30 lows were: 30s (8), 40s (12) and 50s (8). Two lows were in the cooler 20s.

The following astronomical data is provided by the United States Naval Observatory. No data available.

Columbus Day is today. My parents will celebrate their 47th wedding anniversary tomorrow. A brother-in-law, Buddy, celebrates a birthday tomorrow. National Boss Day is in four days. -Bernie-

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