Ask Tom Why

How often is December the coldest month?

3 days ago   |   By WGN TV

Dear Tom,
In Chicago, how often is December the coldest month of the winter?
- Charles Kitchak, Berwyn
Dear Charles,
Chicago's temperature records extend from November 1870 to the present, a period that covers 148 cold seasons. December has been the coldest month 23 times in those 148 cold seasons, or 16 percent of the time. It happened most recently in the winter of 2016-17, when December's average temperature was 25.0 degrees (November was 46.8 degrees, January 28.8, February 38.0, March 39.5).
January turns out to be the coldest month of the cold season most often, with 80 occurrences...
Read more ...

 


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