Stacker compiled a ranking of the wettest Octobers in Illinois since 1895 using data from the National Centers for Environmental Information. Rankings are based on the highest total precipitation in each month. For each of the months listed below, we've included the total precipitation, state-wide highs and lows for the month, and the average state temperature.
#10. October 2019 (tie)
- Total precipitation: 5 inches
- Average temperature: 53.7°F
- Monthly high temperature: 64.3°F
- Monthly low temperature: 43°F
#10. October 2017 (tie)
- Total precipitation: 5 inches
- Average temperature: 58.1°F
- Monthly high temperature: 68.1°F
- Monthly low temperature: 48°F
#9. October 1967
- Total precipitation: 5.07 inches
- Average temperature: 53.4°F
- Monthly high temperature: 63.9°F
- Monthly low temperature: 42.8°F
#8. October 1954
- Total precipitation: 5.1 inches
- Average temperature: 55°F
- Monthly high temperature: 65.3°F
- Monthly low temperature: 44.6°F
#7. October 1969
- Total precipitation: 5.7 inches
- Average temperature: 52.8°F
- Monthly high temperature: 63.7°F
- Monthly low temperature: 41.8°F
#6. October 1991
- Total precipitation: 5.96 inches
- Average temperature: 55.6°F
- Monthly high temperature: 67°F
- Monthly low temperature: 44.2°F
#5. October 2021
- Total precipitation: 6.02 inches
- Average temperature: 60.2°F
- Monthly high temperature: 69.3°F
- Monthly low temperature: 51.1°F
#4. October 2001
#3. October 1919
- Total precipitation: 6.91 inches
- Average temperature: 56.8°F
- Monthly high temperature: 67.5°F
- Monthly low temperature: 46.2°F
#2. October 2009
- Total precipitation: 8.49 inches
- Average temperature: 50.1°F
- Monthly high temperature: 58.4°F
- Monthly low temperature: 41.7°F
#1. October 1941
- Total precipitation: 9.06 inches
- Average temperature: 57.6°F
- Monthly high temperature: 67.1°F
- Monthly low temperature: 48°F
