Frigid Airmass to Bring Significantly Colder Temperatures; Snow Continues Downwind of the Great Lakes

A frigid cold airmass will bring significantly colder weather across the eastern two thirds of the country early this week. Record low temperatures are expected in the Southeast by Tuesday morning. Moderate to heavy lake effect snow will continue downwind of the Great Lakes through Monday. Several inches of snow accumulation is expected, including in portions of the Chicago Metro Read More >

Putting the Chilly July 2009 into Perspective - #1 Coldest at Rockford since 1906, #7 Coldest at Chicago since 1872

Rockford had the coldest July ever on record, running 2F colder than the previous coldest July on record.

In Chicago, July 2009 will go down as the 7th coldest July on record. However...in 1942 the official recording station was moved away from the lakefront. If we look at temperature data from 1942 to present...the July 2009 average temperature of 69.4 would rank second coldest. The coldest July on record since 1942 was 69.3 degrees set back in 1992.

Here are the top ten coldest July's on record for both Rockford and Chicago.

Rockford	Average Temp	Year
1	67.0	2009
2	69.0	1915
3	69.1	1992
	69.1	1996
5	69.5	1962
	69.5	1967
7	69.8	1924
8	70.3	2004
9	70.7	1971
10	70.8	1984

Chicago	Average Temp	Year
July data from 1872-2009 Entire period of record for Chicago
1	67.0	1891
2	68.5	1884
3	68.7	1882
4	68.8	1873
	68.8	1875
6	69.3	1992
7	69.4	2009
8	69.9	1996
9	70.2	1895
	70.2	1915

Chicago	Average Temp	Year
July data from 1942-2009 Period when official Chicago station moved away from lakefront
1	69.3	1992
2	69.4	2009
3	69.9	1996
4	70.3	1984
5	70.6	1967
6	71.1	1947
	71.1	2000
8	71.2	2004
9	71.4	1985
10	71.7	1990

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