In this blog, I'll recount the records, near records and significantly abnormal temperatures of 2007, starting with December 31st and looking back to January 1st. This post covers June, July and August 2007.
August 22: first high of 90 degrees or more the past 29 years (high was 90)... before this, O'Hare had seen eight highs in the 70s and 20 highs in the 80s.
1991 and 1996 narrowly missed 90s degrees as the highs these years were 89.
You have to go way back to 1976 to find the last 90 degree high. In 1976, the high was 90 with a low of 65.
August 19: the first sub 70-degree high of the past 29 years [and coolest high] ...the high was 68 degrees...In fact, you have to go way back to 1967 to see the most recent previous time (before 2007) that the high was sub-70 degrees. In 1967, the high was 64 with a low of 52 and 0.52" of rainfall.
August 18: the first sub 70-degree high of the past 29 years [and coolest high]
...the high was 68 degrees...In fact, you have to go way back to 1963 to see the most recent previous time (before 2007) that the high was sub-70 degrees. In 1963, the high was 69 with a low of 42. What's more, the previous day, 8/17/63, also had a high of 69!
Nothing more to report for August. Therefore I'm continuing with July:
July 8: the second warmest (high of 94, low of 75, mean of 84.5, 11.5 above normal)...warmest was back in 1981 when the high was 94 with a low of 77.
So the low of 75 in 2007 was also the second warmest low behind 1981's 77.
July 3: the coolest high since at least 1979 (71 degrees). The record still stands at 63, going way back to 1909.
Nothing more to report for July. Therefore I'm continuing with June:
June 29: you have to go back 19 years to 1988 for the last time that a high was at least 12 degrees below normal...the high today was 70 and 70 as well in 1988.
The coolest high for the date (since 1979) still stands at 68 degrees in 1984 and the record coolest high is a fall-like 54 degrees set way back in 1899.
June 23: the second coolest high of the date (67 degrees). The high was just 59 at O'Hare in 1979. But the record is 58, set the same year at Midway airport.
June 16: just the fourth high in the 90s (93 degrees) and the second warmest behind 1994's 95-degree high...there were highs of 90 degrees in 1987 and 2006.
June 15: just the third high in the 90s and the "coolest" of the 90s (91 degrees).
June 7: the hottest day...high of 91 with a low of 71...15 degrees above normal.
June 5: just the fourth 60s high (64 degrees).
June 2: just the fifth 60s low (and warmest 60s low): 65 degrees.
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