Stacker compiled a ranking of the Septembers with the most precipitation in Washington since 1895 using data from the National Centers for Environmental Information. Rankings are based on the highest total precipitation in each month. For each of the months listed below, we've included the total precipitation, state-wide highs and lows for the month, and the average state temperature.
#10. September 1911
- Total precipitation: 3.7 inches
- Average temperature: 53.5°F
- Monthly high temperature: 63.7°F
- Monthly low temperature: 43.2°F
#9. September 1941
- Total precipitation: 3.85 inches
- Average temperature: 53.4°F
- Monthly high temperature: 62.4°F
- Monthly low temperature: 44.4°F
#6. September 1997 (tie)
- Total precipitation: 3.88 inches
- Average temperature: 59.2°F
- Monthly high temperature: 70.6°F
- Monthly low temperature: 47.8°F
#6. September 1978 (tie)
- Total precipitation: 3.88 inches
- Average temperature: 55.1°F
- Monthly high temperature: 64.3°F
- Monthly low temperature: 45.9°F
#6. September 1969 (tie)
- Total precipitation: 3.88 inches
- Average temperature: 57.4°F
- Monthly high temperature: 68.2°F
- Monthly low temperature: 46.5°F
#5. September 1933
- Total precipitation: 4 inches
- Average temperature: 53°F
- Monthly high temperature: 63.5°F
- Monthly low temperature: 42.5°F
#4. September 1927
- Total precipitation: 4.2 inches
- Average temperature: 54.7°F
- Monthly high temperature: 64.1°F
- Monthly low temperature: 45.4°F
#3. September 1920
- Total precipitation: 4.84 inches
- Average temperature: 55.3°F
- Monthly high temperature: 65.8°F
- Monthly low temperature: 44.7°F
#2. September 1959
- Total precipitation: 5 inches
- Average temperature: 54.5°F
- Monthly high temperature: 63.8°F
- Monthly low temperature: 45.2°F
#1. September 2013
- Total precipitation: 5.6 inches
- Average temperature: 59.7°F
- Monthly high temperature: 69.9°F
- Monthly low temperature: 49.4°F