Coldest Septembers in Connecticut since 1895

Written by:
September 30, 2025
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Coldest Septembers in Connecticut since 1895

compiled a ranking of the coldest Septembers in Connecticut 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 1938
- Average temperature: 58.7°F
- Monthly high temperature: 69.6°F
- Monthly low temperature: 47.8°F
- Total precipitation: 12.96"

#9. September 1962
- Average temperature: 58.6°F
- Monthly high temperature: 69.6°F
- Monthly low temperature: 47.6°F
- Total precipitation: 3.28"

#8. September 1975
- Average temperature: 58.5°F
- Monthly high temperature: 68.1°F
- Monthly low temperature: 49°F
- Total precipitation: 8.55"

#7. September 1928
- Average temperature: 58.4°F
- Monthly high temperature: 68.2°F
- Monthly low temperature: 48.7°F
- Total precipitation: 3.52"

#6. September 1950
- Average temperature: 58.3°F
- Monthly high temperature: 68.3°F
- Monthly low temperature: 48.3°F
- Total precipitation: 1.51"

#4. September 1956 (tie)
- Average temperature: 58.1°F
- Monthly high temperature: 68.5°F
- Monthly low temperature: 47.8°F
- Total precipitation: 4.86"

#4. September 1924 (tie)
- Average temperature: 58.1°F
- Monthly high temperature: 69.7°F
- Monthly low temperature: 46.5°F
- Total precipitation: 5.24"

#3. September 1963
- Average temperature: 57.9°F
- Monthly high temperature: 69.5°F
- Monthly low temperature: 46.4°F
- Total precipitation: 3.87"

#2. September 1918
- Average temperature: 57.6°F
- Monthly high temperature: 68.4°F
- Monthly low temperature: 46.8°F
- Total precipitation: 6.83"

#1. September 1917
- Average temperature: 57.3°F
- Monthly high temperature: 69.2°F
- Monthly low temperature: 45.4°F
- Total precipitation: 1.83"

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