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compiled a ranking of the coldest Octobers in Washington 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 1930
- Average temperature: 44.5°F
- Monthly high temperature: 54°F
- Monthly low temperature: 35°F
- Total precipitation: 3.18"

#8. October 2009 (tie)
- Average temperature: 44.2°F
- Monthly high temperature: 53°F
- Monthly low temperature: 35.5°F
- Total precipitation: 5.57"

#8. October 1913 (tie)
- Average temperature: 44.2°F
- Monthly high temperature: 52.9°F
- Monthly low temperature: 35.4°F
- Total precipitation: 3.96"

#7. October 1984
- Average temperature: 43.8°F
- Monthly high temperature: 53.2°F
- Monthly low temperature: 34.3°F
- Total precipitation: 4.08"

#6. October 1949
- Average temperature: 43.6°F
- Monthly high temperature: 53.9°F
- Monthly low temperature: 33.2°F
- Total precipitation: 3.46"

#5. October 1912
- Average temperature: 43.5°F
- Monthly high temperature: 52.6°F
- Monthly low temperature: 34.4°F
- Total precipitation: 3.83"

#4. October 1946
- Average temperature: 43.3°F
- Monthly high temperature: 52.6°F
- Monthly low temperature: 34°F
- Total precipitation: 4.31"

#3. October 1919
- Average temperature: 43.1°F
- Monthly high temperature: 53.1°F
- Monthly low temperature: 33.1°F
- Total precipitation: 2.14"

#2. October 2019
- Average temperature: 42.8°F
- Monthly high temperature: 52.3°F
- Monthly low temperature: 33.2°F
- Total precipitation: 3.79"

#1. October 1905
- Average temperature: 41.8°F
- Monthly high temperature: 50.3°F
- Monthly low temperature: 33.2°F
- Total precipitation: 5.34"