Chicago, IL Climate

Summary Graph

The summary climate graph for Chicago, IL shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Chicago, IL.


The warmest month in Chicago Midway International, Chicago, Illinois is July with an average high temperature of 85.3°F. The hottest day on record was July 13 1995 when the temperature hit 106.0°F. During January the overnight temperature drops to an average of 18.0°F with the lowest temperature of -23.8°F being recorded on January 20 1985.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

13 Jul 1995106°F
30 Jul 1999104°F
24 Jul 2005104°F
6 Jul 2012104°F
25 Jun 1988102°F

The warmest months on average were:

July 201292.4°F
July 199990.7°F
July 197790.2°F
July 201189.2°F
August 199588.7°F

The coldest days on record are:

20 Jan 1985-23.8°F
10 Jan 1982-20.7°F
16 Jan 1977-19.1°F
15 Jan 1979-19.1°F
18 Jan 1994-19.1°F

The coldest months on average were:

January 1977-0.3°F
January 19794.1°F
January 19786.8°F
February 19797.5°F
January 19828°F


The wettest month by average rainfall in Chicago, IL is June with an average of 2.5 inches of rain falling on 9 to 10 days.Although in April it typically rains on more days with 2.3 inches falling in 11 to 12 days. The driest month by average rainfall in Chicago, IL is November with an average of 1.1 inches of rain falling on 9 to 10 days. Although in February it typically rains on less days with 1.3 inches falling in 4 to 5 days

Wettest Days

The wettest days on record are:

8 April 19735.5 inches
19 April 19753.5 inches
25 April 19762.6 inches
12 April 19791.8 inches
23 April 19991.5 inches

Wettest Months

The wettest months on record are:

February 197320 inches
March 197318.5 inches
May 197317.9 inches
September 197713.7 inches
April 197313.4 inches

Driest Months

The driest months on record are:

June 19800 inches
April 19800 inches
March 19800 inches
February 19800 inches
May 19800 inches