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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