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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 Colorado 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 1933
- Average temperature: 61.1°F
- Monthly high temperature: 76°F
- Monthly low temperature: 46.2°F
- Total precipitation: 1.9"

#8. September 2010 (tie)
- Average temperature: 61.2°F
- Monthly high temperature: 78°F
- Monthly low temperature: 44.4°F
- Total precipitation: 0.73"

#8. September 1990 (tie)
- Average temperature: 61.2°F
- Monthly high temperature: 75.3°F
- Monthly low temperature: 47°F
- Total precipitation: 2.1"

#7. September 2024
- Average temperature: 61.7°F
- Monthly high temperature: 77.8°F
- Monthly low temperature: 45.6°F
- Total precipitation: 1.02"

#6. September 2018
- Average temperature: 61.9°F
- Monthly high temperature: 77.2°F
- Monthly low temperature: 46.5°F
- Total precipitation: 0.66"

#5. September 2021
- Average temperature: 62.4°F
- Monthly high temperature: 78.2°F
- Monthly low temperature: 46.5°F
- Total precipitation: 1.23"

#3. September 2022 (tie)
- Average temperature: 62.5°F
- Monthly high temperature: 78.2°F
- Monthly low temperature: 46.8°F
- Total precipitation: 1.21"

#3. September 1998 (tie)
- Average temperature: 62.5°F
- Monthly high temperature: 77.6°F
- Monthly low temperature: 47.4°F
- Total precipitation: 0.89"

#2. September 2015
- Average temperature: 62.6°F
- Monthly high temperature: 77.9°F
- Monthly low temperature: 47.2°F
- Total precipitation: 0.76"

#1. September 2019
- Average temperature: 62.9°F
- Monthly high temperature: 78.3°F
- Monthly low temperature: 47.5°F
- Total precipitation: 0.71"