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compiled a ranking of the coldest Octobers in Idaho 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. October 1912
- Average temperature: 40°F
- Monthly high temperature: 50.1°F
- Monthly low temperature: 29.9°F
- Total precipitation: 2.62"

#9. October 1970
- Average temperature: 39.9°F
- Monthly high temperature: 51.6°F
- Monthly low temperature: 28.2°F
- Total precipitation: 1.83"

#8. October 1984
- Average temperature: 39.6°F
- Monthly high temperature: 50°F
- Monthly low temperature: 29.1°F
- Total precipitation: 2"

#7. October 2009
- Average temperature: 39.5°F
- Monthly high temperature: 49.6°F
- Monthly low temperature: 29.3°F
- Total precipitation: 2.47"

#6. October 1949
- Average temperature: 39.4°F
- Monthly high temperature: 50.5°F
- Monthly low temperature: 28.2°F
- Total precipitation: 1.98"

#5. October 1905
- Average temperature: 39.1°F
- Monthly high temperature: 51.2°F
- Monthly low temperature: 26.9°F
- Total precipitation: 1.32"

#4. October 1969
- Average temperature: 39°F
- Monthly high temperature: 49.6°F
- Monthly low temperature: 28.4°F
- Total precipitation: 1.39"

#3. October 1946
- Average temperature: 38.6°F
- Monthly high temperature: 47.6°F
- Monthly low temperature: 29.7°F
- Total precipitation: 3.45"

#2. October 1919
- Average temperature: 37.5°F
- Monthly high temperature: 47°F
- Monthly low temperature: 28°F
- Total precipitation: 2.01"

#1. October 2019
- Average temperature: 36.6°F
- Monthly high temperature: 48.7°F
- Monthly low temperature: 24.6°F
- Total precipitation: 1.58"