Today is December 20th. It's the 354th day of the year. 11 days remain. It's week 51 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 33 and the normal low is 19. I've calculated the 31-year averages at 32 and 17.
On the warm side, in 1988 the high was 56 with a low of 32. Two years later, in 1990, the high was 49 with a low of 30. Four years after that, in 1994, the high was 42 with a low of 34. The record high of 67 and record warmest low of 55 were set on the same day way back in 1877. Over the last 31 years, 13 highs were in the 30s. Eight highs were in the warmer: 40s (7) and 50s (1). Ten highs were in the cooler: 0s (aka single digits)(1), 10s (aka teens)(4) and 20s (5).
In looking back through the years to the first December at O'Hare in 1958, the following instances were notable: in 1972 the high was 37 with a warm low of 34, a mere three degree spread. In 1968 the high was 33 with a low of 26, a seven degree spread. In 1967 the high was 55 with a low of 36, a warm day. In 1966 the high was 36 with a low of 32, a four degree spread. In 1965 the high was 35 with a low of 29, a six degree spread. In 1964 the low was a cold 7 degrees. In 1963 the high was 6 with a low of -16, a cold day. That low of -16 was colder than the record low. The high of 6 was near the record coolest high of 4, set way back in 1901. In 1960 the high was 22 with a cold low of 6, a cold day. In 1959 the high was 31 with a low of 28, a mere three degree spread. In 1958 the high was a cold 21 with a low of 8, a cold day.
More recently, there was a large spread of 32 degrees in 1999 (37/5). There were small spreads of five degrees in 1991 (35/30) and six degrees in 2002 (35/29).
On the cold side, in 1989 the high was 5 with a low of -6. In 1980 the high was 10 with a low of -1. In 2000 the high was 17 with a low of -5. In 1983 the high was 20 with a low of -1. In 1996 the high was 17 with a low of 3. In 1981 the high was 22 with a low of -1. In 1985 the high was 19 with a low of 3. In 2005 the high was 21 with a low of 5. Another cold low was 5 in 1999. The record low of -9 was set in 1963. The record coolest high of 4 occurred way back in 1901. 13 of the last 31 lows were 20s. 14 lows were in the cooler: negative 0s (5), single digits (4) and 10s (aka teens) (5). Four lows were in the warmer 30s.
In 1973, O'Hare had 0.1 inches of snow today. This was the eighth day of a string of eight days which produced 17.6 inches, or 94% of the month's total of 18.8 inches. In 1960, Midway had 11 inches while O'Hare had just 3.1 inches. O'Hare also had 1.1 on the 19th.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:46 and sunrise is at 7:18. Sunset is at 16:24 and twilight ends at 16:56. Tomorrow twilight begins at 6:47 and sunrise is at 7:19. There's a total of 9 hours, 6 minutes of daylight today and 10 hours, 10 minutes between twilights. The moon is waxing crescent. Illumination was 12% at midnight, will be 16% at noon and 19% at midnight tonight. Moonrise is at 9:56 this morning. Moonset is at 20:32. Moonlight time is 10 hours, 36 minutes which is 35 minutes longer than yesterday.
Christmas Eve is in four days and Christmas Day is in five days. New Year's Eve is in 11 days and New Year's Day is in 12 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 33 and the normal low is 19. I've calculated the 31-year averages at 32 and 17.
On the warm side, in 1988 the high was 56 with a low of 32. Two years later, in 1990, the high was 49 with a low of 30. Four years after that, in 1994, the high was 42 with a low of 34. The record high of 67 and record warmest low of 55 were set on the same day way back in 1877. Over the last 31 years, 13 highs were in the 30s. Eight highs were in the warmer: 40s (7) and 50s (1). Ten highs were in the cooler: 0s (aka single digits)(1), 10s (aka teens)(4) and 20s (5).
In looking back through the years to the first December at O'Hare in 1958, the following instances were notable: in 1972 the high was 37 with a warm low of 34, a mere three degree spread. In 1968 the high was 33 with a low of 26, a seven degree spread. In 1967 the high was 55 with a low of 36, a warm day. In 1966 the high was 36 with a low of 32, a four degree spread. In 1965 the high was 35 with a low of 29, a six degree spread. In 1964 the low was a cold 7 degrees. In 1963 the high was 6 with a low of -16, a cold day. That low of -16 was colder than the record low. The high of 6 was near the record coolest high of 4, set way back in 1901. In 1960 the high was 22 with a cold low of 6, a cold day. In 1959 the high was 31 with a low of 28, a mere three degree spread. In 1958 the high was a cold 21 with a low of 8, a cold day.
More recently, there was a large spread of 32 degrees in 1999 (37/5). There were small spreads of five degrees in 1991 (35/30) and six degrees in 2002 (35/29).
On the cold side, in 1989 the high was 5 with a low of -6. In 1980 the high was 10 with a low of -1. In 2000 the high was 17 with a low of -5. In 1983 the high was 20 with a low of -1. In 1996 the high was 17 with a low of 3. In 1981 the high was 22 with a low of -1. In 1985 the high was 19 with a low of 3. In 2005 the high was 21 with a low of 5. Another cold low was 5 in 1999. The record low of -9 was set in 1963. The record coolest high of 4 occurred way back in 1901. 13 of the last 31 lows were 20s. 14 lows were in the cooler: negative 0s (5), single digits (4) and 10s (aka teens) (5). Four lows were in the warmer 30s.
In 1973, O'Hare had 0.1 inches of snow today. This was the eighth day of a string of eight days which produced 17.6 inches, or 94% of the month's total of 18.8 inches. In 1960, Midway had 11 inches while O'Hare had just 3.1 inches. O'Hare also had 1.1 on the 19th.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 6:46 and sunrise is at 7:18. Sunset is at 16:24 and twilight ends at 16:56. Tomorrow twilight begins at 6:47 and sunrise is at 7:19. There's a total of 9 hours, 6 minutes of daylight today and 10 hours, 10 minutes between twilights. The moon is waxing crescent. Illumination was 12% at midnight, will be 16% at noon and 19% at midnight tonight. Moonrise is at 9:56 this morning. Moonset is at 20:32. Moonlight time is 10 hours, 36 minutes which is 35 minutes longer than yesterday.
Christmas Eve is in four days and Christmas Day is in five days. New Year's Eve is in 11 days and New Year's Day is in 12 days. -Bernie-
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