Hottest Septembers in Idaho since 1895

Written by:
September 26, 2025
Witaya Proadtayakogool // Shutterstock

Hottest Septembers in Idaho 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 Idaho 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.

#9. September 2024 (tie)
- Average temperature: 59.4掳F
- Monthly high temperature: 74.6掳F
- Monthly low temperature: 44.3掳F
- Total precipitation: 1.16"

#9. September 2001 (tie)
- Average temperature: 59.4掳F
- Monthly high temperature: 75.4掳F
- Monthly low temperature: 43.3掳F
- Total precipitation: 0.73"

#7. September 2011 (tie)
- Average temperature: 59.6掳F
- Monthly high temperature: 75.7掳F
- Monthly low temperature: 43.4掳F
- Total precipitation: 0.39"

#7. September 1967 (tie)
- Average temperature: 59.6掳F
- Monthly high temperature: 75.4掳F
- Monthly low temperature: 43.8掳F
- Total precipitation: 0.85"

#6. September 1963
- Average temperature: 59.7掳F
- Monthly high temperature: 73.4掳F
- Monthly low temperature: 46掳F
- Total precipitation: 1.8"

#5. September 2009
- Average temperature: 60.1掳F
- Monthly high temperature: 76.4掳F
- Monthly low temperature: 43.9掳F
- Total precipitation: 0.35"

#4. September 1938
- Average temperature: 60.2掳F
- Monthly high temperature: 76.1掳F
- Monthly low temperature: 44.3掳F
- Total precipitation: 0.52"

#3. September 1998
- Average temperature: 60.4掳F
- Monthly high temperature: 74.3掳F
- Monthly low temperature: 46.4掳F
- Total precipitation: 1.84"

#2. September 2022
- Average temperature: 60.8掳F
- Monthly high temperature: 76.3掳F
- Monthly low temperature: 45.3掳F
- Total precipitation: 0.98"

#1. September 1990
- Average temperature: 61.7掳F
- Monthly high temperature: 77.8掳F
- Monthly low temperature: 45.5掳F
- Total precipitation: 0.37"

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