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.
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.
The warmest days on record are:
| 26 Jun 1988 | 105.1°F |
| 25 Jul 2005 | 104°F |
| 24 Jul 2012 | 104°F |
| 18 Aug 1988 | 102.9°F |
| 29 Jul 1983 | 102°F |
The warmest months on average were:
| July 2012 | 96.5°F |
| August 1983 | 93.9°F |
| July 1988 | 93.1°F |
| July 1983 | 93°F |
| August 1988 | 92.7°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 1979 | 0.4°F |
| January 1978 | 3.5°F |
| January 1982 | 4.6°F |
| February 1979 | 4.9°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.
The wettest days on record are:
| 29 April 1973 | 8.7 inches |
| 17 April 1982 | 3 inches |
| 2 April 1983 | 2.9 inches |
| 24 April 1976 | 2 inches |
| 23 April 1989 | 1.8 inches |
The wettest months on record are:
| April 1973 | 27.7 inches |
| May 1973 | 16.2 inches |
| March 1973 | 13.7 inches |
| January 1973 | 13.5 inches |
| September 2008 | 12.4 inches |
The driest months on record are:
| September 1979 | 0.1 inches |
| February 1987 | 0.2 inches |
| November 1999 | 0.3 inches |
| August 1992 | 0.3 inches |
| January 1986 | 0.3 inches |