Hottest Septembers in Illinois 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 Illinois 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 2015
- Average temperature: 70.4掳F
- Monthly high temperature: 82掳F
- Monthly low temperature: 58.8掳F
- Total precipitation: 3.42"
#9. September 2005
- Average temperature: 70.7掳F
- Monthly high temperature: 82.9掳F
- Monthly low temperature: 58.5掳F
- Total precipitation: 3.63"
#8. September 2016
- Average temperature: 70.8掳F
- Monthly high temperature: 81.6掳F
- Monthly low temperature: 60.1掳F
- Total precipitation: 3.42"
#7. September 1998
- Average temperature: 70.9掳F
- Monthly high temperature: 82.8掳F
- Monthly low temperature: 59掳F
- Total precipitation: 2.28"
#6. September 1939
- Average temperature: 71.2掳F
- Monthly high temperature: 85.4掳F
- Monthly low temperature: 56.9掳F
- Total precipitation: 0.72"
#5. September 1897
- Average temperature: 71.3掳F
- Monthly high temperature: 86.4掳F
- Monthly low temperature: 56.1掳F
- Total precipitation: 0.99"
#4. September 2019
- Average temperature: 71.6掳F
- Monthly high temperature: 82掳F
- Monthly low temperature: 61.1掳F
- Total precipitation: 5"
#3. September 1931
- Average temperature: 72掳F
- Monthly high temperature: 83.5掳F
- Monthly low temperature: 60.5掳F
- Total precipitation: 4.78"
#1. September 1933 (tie)
- Average temperature: 72.2掳F
- Monthly high temperature: 84.6掳F
- Monthly low temperature: 59.8掳F
- Total precipitation: 3.72"
#1. September 1925 (tie)
- Average temperature: 72.2掳F
- Monthly high temperature: 83.4掳F
- Monthly low temperature: 61掳F
- Total precipitation: 4.83"
