Images (click to enlarge): High temperatures in Chicago region, July 4 and 5, 2012, from National Weather Service
The continuing heat wave at Chicago has crushed the daily high temperature record for July 6 by at least 4°. The high so far today of 103° also marks the third consecutive day of 100°+ temperatures, tying the record set in 1911 and 1947. The all-time record hottest temperature at Chicago was 105° on July 24, 1934.
The preliminary report from the National Weather Service:
TEMPERATURES THIS AFTERNOON ACROSS NORTHERN ILLINOIS HAVE ALREADY
REACHED THE CENTURY MARK. THE TEMPERATURE HAS REACHED 103 AT CHICAGO
OHARE AIRPORT AT 122 PM CDT...AND AT ROCKFORD THE TEMPERATURE
HAS REACHED 104 AT 146 PM CDT. OTHER PLACES THAT HAVE REACHED THE
CENTURY MARK INCLUDE WHEELING...104 DEGREES...MIDWAY AIRPORT...103
DEGREES...AURORA AIRPORT...100 DEGREES...DUPAGE AIRPORT 100
DEGREES...WFO ROMEOVILLE 100 DEGREES...AND WAUKEGAN AT 100 DEGREES.
THE RECORD TEMPERATURE FOR CHICAGO TODAY WAS 99 DEGREES SET BACK IN
1988 AND 1874. THE RECORD TEMPERATURE FOR ROCKFORD WAS 102 SET IN
1936 AND 1911.
THIS IS ALSO THE THIRD CONSECUTIVE DAY...JULY 4-6 THAT 100 DEGREES
WAS REACHED AT THE OFFICIAL CLIMATE SITE FOR CHICAGO TO JOIN JULY
3-5 1911...AUGUST 4-6 1947.
IN ADDITION TO HIGH TEMPERATURES RECORDS...IT IS POSSIBLE THAT THE
RECORD FOR HIGHEST MINIMUM TEMPERATURE COULD BE BROKEN. THE LOW
THIS MORNING WAS 82 AT CHICAGO...AND THE RECORD IS 80 IN 1977. AT
ROCKFORD THE LOW TEMPERATURE THIS MORNING WAS 77...AND THE RECORD IS
73 SET IN 1948.