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Chicago Weather - Average Monthly Temperatures

Thirty Year Average - From 1971 to 2000

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Chicago Weather - Average Monthly Temperatures
NOAA
Complaining about Chicago weather, particularly its winters, can be a local pastime, but just how bad is it? What can you expect from Chicago weather?

Below are the average monthly temperatures in degrees Farenheit for Chicago, Illinois as recorded by the National Weather Service between 1971 and 2000. These temperatures were taken at O'Hare International Airport.

January
  • High - 29.6
  • Low - 14.3
February
  • High - 34.7
  • Low - 19.2
March
  • High - 46.1
  • Low - 28.5
April
  • High - 58.0
  • Low - 37.6
May
  • High - 69.9
  • Low - 47.5
June
  • High - 79.2
  • Low - 57.2
July
  • High - 83.5
  • Low - 63.2
August
  • High - 81.2
  • Low - 62.2
September
  • High - 73.9
  • Low - 53.7
October
  • High - 62.1
  • Low - 42.1
November
  • High - 47.1
  • Low - 31.6
December
  • High - 34.4
  • Low - 20.4
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