Coldest Decembers in Illinois since 1895
compiled a ranking of the coldest Decembers in Illinois since 1895 using data from the . Rankings are based on the lowest average temperature in each month. For each of the coldest months listed below, we've included the average state temperature, state-wide highs and lows for the month, and the total precipitation.
#9. December 1919 (tie)
- Average temperature: 22.6掳F
- Monthly high temperature: 30.9掳F
- Monthly low temperature: 14.2掳F
- Total precipitation: 0.72"
#9. December 1914 (tie)
- Average temperature: 22.6掳F
- Monthly high temperature: 30掳F
- Monthly low temperature: 15.2掳F
- Total precipitation: 2.36"
#8. December 1950
- Average temperature: 21.5掳F
- Monthly high temperature: 30.4掳F
- Monthly low temperature: 12.7掳F
- Total precipitation: 1.4"
#7. December 1985
- Average temperature: 20.9掳F
- Monthly high temperature: 30.4掳F
- Monthly low temperature: 11.5掳F
- Total precipitation: 2.31"
#6. December 1917
- Average temperature: 20.6掳F
- Monthly high temperature: 29.3掳F
- Monthly low temperature: 11.9掳F
- Total precipitation: 0.85"
#5. December 1909
- Average temperature: 20.2掳F
- Monthly high temperature: 28.1掳F
- Monthly low temperature: 12.3掳F
- Total precipitation: 3.03"
#3. December 1989 (tie)
- Average temperature: 18掳F
- Monthly high temperature: 27.6掳F
- Monthly low temperature: 8.4掳F
- Total precipitation: 0.85"
#3. December 1963 (tie)
- Average temperature: 18掳F
- Monthly high temperature: 27掳F
- Monthly low temperature: 9掳F
- Total precipitation: 0.87"
#2. December 2000
- Average temperature: 17.6掳F
- Monthly high temperature: 25.9掳F
- Monthly low temperature: 9.3掳F
- Total precipitation: 1.94"
#1. December 1983
- Average temperature: 17.3掳F
- Monthly high temperature: 24.3掳F
- Monthly low temperature: 10.3掳F
- Total precipitation: 3.46"
