Peoria, IL Climate

Summary Graph

The summary climate graph for Peoria, 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 Peoria, IL.


The warmest month in Peoria Regional, Peoria, Illinois is July with an average high temperature of 87.4°F. The hottest day on record was June 26 1988 when the temperature hit 105.1°F. During January the overnight temperature drops to an average of 15.6°F with the lowest temperature of -25.1°F being recorded on January 17 1977.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

26 Jun 1988105.1°F
25 Jul 2005104°F
24 Jul 2012104°F
18 Aug 1988102.9°F
29 Jul 1983102°F

The warmest months on average were:

July 201296.5°F
August 198393.9°F
July 198893.1°F
July 198393°F
August 198892.7°F

The coldest days on record are:

17 Jan 1977-25.1°F
23 Dec 1989-23.1°F
20 Jan 1985-22.2°F
15 Jan 1979-22°F
19 Jan 1994-20.9°F

The coldest months on average were:

January 1977-2.1°F
January 19790.4°F
January 19783.5°F
January 19824.6°F
February 19794.9°F


The wettest month in Peoria, IL is May with an average of 4.6 inches of rain falling on 13 to 14 days. The driest month in Peoria, IL is February with an average of 2.1 inches of rain falling on 5 to 6 days.

Wettest Days

The wettest days on record are:

29 April 19738.7 inches
17 April 19823 inches
2 April 19832.9 inches
24 April 19762 inches
23 April 19891.8 inches

Wettest Months

The wettest months on record are:

April 197327.7 inches
May 197316.2 inches
March 197313.7 inches
January 197313.5 inches
September 200812.4 inches

Driest Months

The driest months on record are:

September 19790.1 inches
February 19870.2 inches
November 19990.3 inches
August 19920.3 inches
January 19860.3 inches