Today is July 29th. It's the 210th day of the year. 155 days remain. It's week 30 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 84 and the normal low is 64. I've calculated the 30-year averages at 85 and 63.
On the hot side, there were no days of a mean of at least 11.5 degrees above normal. The hottest temperatures were 97 in 1988, 96 in 1983, 96 in 1999 and 95 in 1995. The record high of 99 was set back in 1913. Warm lows were 74 in 2006 and 73 in 1990. The record warmest low of 85 occurred back in 1916. We had very high dew points in 1999. The top was 82 degrees, making 1999 perhaps the most humid July 29 on record. 15 of the last 30 highs were 80s. Seven highs were in the warmer 90s. Eight highs were in the cooler 70s.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 90. In 1975 the high was 92. In 1965 the high was 80 with a low of 50, a 30 degree spread. That low of 50 is the same as the record low. In 1962 the high was 71 with a low of 54, a cool day. in 1960 the high was 91. In 1959 the high was 94.
More recently, there were large spreads of 30 degrees in both 1979 (88/58) and 1994 (82/52).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest lows were the record low of 50 in 1984, 51 in 1981 and 52 in 1994. The record coolest high of 63 occurred way back in 1892. The official thermometer was located near Lake Michigan at the time. 17 of the last 30 lows were 60s. Eight lows were in the cooler 50s. Five lows were in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:11 and sunrise is at 5:43. Sunset is at 20:16 and twilight ends at 20:47. Tomorrow twilight begins at 5:12 and sunrise is at 5:44. There's a total of 14 hours, 33 minutes of daylight today and 15 hours, 36 minutes between twilights. The moon reached first quarter yesterday at 17:00 and is waxing gibbous. Illumination was 54% at midnight, will be 59% at noon and 63% at midnight tonight. Moonrise is at 14:43. Moonset is at four minutes past midnight tonight. Moonrise is at 15:46 tomorrow. Moonlight time is 9 hours, 17 minutes which is 37 minutes shorter than yesterday.
My tennis coach, Bob Finder, will be 77 in three weeks. -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 84 and the normal low is 64. I've calculated the 30-year averages at 85 and 63.
On the hot side, there were no days of a mean of at least 11.5 degrees above normal. The hottest temperatures were 97 in 1988, 96 in 1983, 96 in 1999 and 95 in 1995. The record high of 99 was set back in 1913. Warm lows were 74 in 2006 and 73 in 1990. The record warmest low of 85 occurred back in 1916. We had very high dew points in 1999. The top was 82 degrees, making 1999 perhaps the most humid July 29 on record. 15 of the last 30 highs were 80s. Seven highs were in the warmer 90s. Eight highs were in the cooler 70s.
In looking back through the years to the first July at O'Hare in 1959, the following instances were notable: In 1977 the high was 90. In 1975 the high was 92. In 1965 the high was 80 with a low of 50, a 30 degree spread. That low of 50 is the same as the record low. In 1962 the high was 71 with a low of 54, a cool day. in 1960 the high was 91. In 1959 the high was 94.
More recently, there were large spreads of 30 degrees in both 1979 (88/58) and 1994 (82/52).
On the cool side, there were no days of a mean of at least 11.5 degrees below normal. The coolest lows were the record low of 50 in 1984, 51 in 1981 and 52 in 1994. The record coolest high of 63 occurred way back in 1892. The official thermometer was located near Lake Michigan at the time. 17 of the last 30 lows were 60s. Eight lows were in the cooler 50s. Five lows were in the warmer 70s.
The following astronomical data is provided by the United States Naval Observatory. In Crystal Lake, twilight begins at 5:11 and sunrise is at 5:43. Sunset is at 20:16 and twilight ends at 20:47. Tomorrow twilight begins at 5:12 and sunrise is at 5:44. There's a total of 14 hours, 33 minutes of daylight today and 15 hours, 36 minutes between twilights. The moon reached first quarter yesterday at 17:00 and is waxing gibbous. Illumination was 54% at midnight, will be 59% at noon and 63% at midnight tonight. Moonrise is at 14:43. Moonset is at four minutes past midnight tonight. Moonrise is at 15:46 tomorrow. Moonlight time is 9 hours, 17 minutes which is 37 minutes shorter than yesterday.
My tennis coach, Bob Finder, will be 77 in three weeks. -Bernie-
No comments:
Post a Comment