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compiled a ranking of the coldest Januarys 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. January 1985
- Average temperature: 18.2°F
- Monthly high temperature: 27.2°F
- Monthly low temperature: 9.3°F
- Total precipitation: 1.61"

#9. January 1970
- Average temperature: 17.6°F
- Monthly high temperature: 26.5°F
- Monthly low temperature: 8.8°F
- Total precipitation: 0.63"

#8. January 1982
- Average temperature: 16.7°F
- Monthly high temperature: 26.2°F
- Monthly low temperature: 7.2°F
- Total precipitation: 4.19"

#7. January 1963
- Average temperature: 16°F
- Monthly high temperature: 24.7°F
- Monthly low temperature: 7.4°F
- Total precipitation: 0.71"

#6. January 1978
- Average temperature: 15.8°F
- Monthly high temperature: 24.3°F
- Monthly low temperature: 7.4°F
- Total precipitation: 1.22"

#5. January 1940
- Average temperature: 13.1°F
- Monthly high temperature: 21.4°F
- Monthly low temperature: 4.8°F
- Total precipitation: 1.43"

#4. January 1912
- Average temperature: 12.9°F
- Monthly high temperature: 21.2°F
- Monthly low temperature: 4.6°F
- Total precipitation: 1.1"

#3. January 1979
- Average temperature: 12.7°F
- Monthly high temperature: 21.1°F
- Monthly low temperature: 4.4°F
- Total precipitation: 2.97"

#2. January 1918
- Average temperature: 10.9°F
- Monthly high temperature: 20.1°F
- Monthly low temperature: 1.6°F
- Total precipitation: 2.35"

#1. January 1977
- Average temperature: 10.1°F
- Monthly high temperature: 19.4°F
- Monthly low temperature: 0.9°F
- Total precipitation: 1.13"