Hottest Septembers in Connecticut since 1895

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September 26, 2025
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Hottest Septembers in Connecticut since 1895

In 2022, the continental United States experienced its , according to data from the National Oceanic and Atmospheric Administration, while 20 states saw one of their in the same month. The year prior, July marked the .

Climate change is driving rising temperatures and more record heat. The has climbed each decade since 1880 by about .14 degrees Fahrenheit, or roughly 2 degrees Fahrenheit total.

compiled a ranking of the hottest Septembers in Connecticut since 1895 using data from the . Rankings are based on the highest average temperature in each month. For each of the hottest months listed below, we've included the average state temperature, state-wide highs and lows for the month, and the total precipitation.

#10. September 2021
- Average temperature: 65.2掳F
- Monthly high temperature: 74.5掳F
- Monthly low temperature: 55.9掳F
- Total precipitation: 8.19"

#9. September 1921
- Average temperature: 65.5掳F
- Monthly high temperature: 76.9掳F
- Monthly low temperature: 54.1掳F
- Total precipitation: 3.02"

#8. September 2010
- Average temperature: 65.6掳F
- Monthly high temperature: 76.2掳F
- Monthly low temperature: 55.1掳F
- Total precipitation: 2.62"

#6. September 2017 (tie)
- Average temperature: 66掳F
- Monthly high temperature: 76.2掳F
- Monthly low temperature: 55.8掳F
- Total precipitation: 2.3"

#6. September 2005 (tie)
- Average temperature: 66掳F
- Monthly high temperature: 77.9掳F
- Monthly low temperature: 54.1掳F
- Total precipitation: 2.39"

#5. September 2018
- Average temperature: 66.1掳F
- Monthly high temperature: 74.1掳F
- Monthly low temperature: 58.1掳F
- Total precipitation: 8.56"

#4. September 2016
- Average temperature: 66.2掳F
- Monthly high temperature: 76.7掳F
- Monthly low temperature: 55.7掳F
- Total precipitation: 1.92"

#3. September 2011
- Average temperature: 66.4掳F
- Monthly high temperature: 75.4掳F
- Monthly low temperature: 57.3掳F
- Total precipitation: 7.78"

#2. September 1961
- Average temperature: 67.7掳F
- Monthly high temperature: 78.6掳F
- Monthly low temperature: 56.8掳F
- Total precipitation: 4.58"

#1. September 2015
- Average temperature: 67.8掳F
- Monthly high temperature: 79.7掳F
- Monthly low temperature: 55.8掳F
- Total precipitation: 3.62"

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