Coldest Septembers in Illinois since 1895
compiled a ranking of the coldest Septembers 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.
#10. September 1896
- Average temperature: 62.6掳F
- Monthly high temperature: 73.9掳F
- Monthly low temperature: 51.3掳F
- Total precipitation: 5.37"
#9. September 1943
- Average temperature: 62.4掳F
- Monthly high temperature: 74.4掳F
- Monthly low temperature: 50.4掳F
- Total precipitation: 2.35"
#8. September 1928
- Average temperature: 61.9掳F
- Monthly high temperature: 75掳F
- Monthly low temperature: 48.7掳F
- Total precipitation: 2.27"
#7. September 1975
- Average temperature: 61.8掳F
- Monthly high temperature: 72.4掳F
- Monthly low temperature: 51.2掳F
- Total precipitation: 2.73"
#5. September 1993 (tie)
- Average temperature: 61.6掳F
- Monthly high temperature: 71.2掳F
- Monthly low temperature: 52掳F
- Total precipitation: 7.54"
#5. September 1902 (tie)
- Average temperature: 61.6掳F
- Monthly high temperature: 72.6掳F
- Monthly low temperature: 50.6掳F
- Total precipitation: 4.07"
#4. September 1974
- Average temperature: 61掳F
- Monthly high temperature: 72.2掳F
- Monthly low temperature: 49.7掳F
- Total precipitation: 2.71"
#3. September 1924
- Average temperature: 60.8掳F
- Monthly high temperature: 72.1掳F
- Monthly low temperature: 49.5掳F
- Total precipitation: 3.07"
#2. September 1949
- Average temperature: 60.4掳F
- Monthly high temperature: 72.6掳F
- Monthly low temperature: 48.2掳F
- Total precipitation: 2.82"
#1. September 1918
- Average temperature: 58.9掳F
- Monthly high temperature: 70.8掳F
- Monthly low temperature: 47掳F
- Total precipitation: 3.88"
