Washington September Weather

Washington weather averages and all-time records in the month of September from 1991–2020 based on data made available by the NOAA.
State:
Month:
Statewide September Averages
High temperature 70.8 °F
Low temperature 46.1 °F
Precipitation 1.7 inches
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Washington Cities
September weather averages for various places in Washington, from 1991–2020.
City Average (°F) Record (°F) Monthly (inches)
High Low High Low Precipitation Snow
Aberdeen 68.7 51.1 100 30 2.7 0.0
Battle Ground 74.7 46.8 105 26 2.2 0.0
Bellingham 67.6 49.1 89 23 1.9 n/a
Blaine 66.5 50.0 87 25 2.1 0.0
Bremerton 71.9 51.1 97 30 2.0 n/a
Centralia 73.7 49.8 100 24 1.6 0.0
Chelan 76.1 51.5 97 26 0.3 0.0
Davenport 73.4 41.3 100 17 0.5 0.0
Ellensburg 76.3 44.6 98 16 0.3 0.0
Ephrata 78.8 50.9 106 20 0.2 n/a
Everett 68.2 51.9 89 30 1.8 n/a
Forks 69.6 47.8 100 24 4.8 0.0
Goldendale 78.3 43.0 103 19 0.5 n/a
Holden 68.2 39.1 96 22 1.6 0.0
Kennewick 80.8 48.9 102 21 0.3 n/a
Leavenworth 79.1 43.4 104 19 0.7 0.0
Longview 75.1 50.2 104 29 1.8 0.0
Olympia 72.3 46.1 98 25 2.0 n/a
Pasco 80.8 48.9 102 21 0.3 n/a
Port Angeles 66.0 48.0 88 31 1.2 n/a
Pullman 75.3 44.7 103 20 0.6 0.0
Renton 71.9 53.2 96 26 1.5 n/a
Richland 80.4 48.2 106 21 0.3 n/a
Seattle 70.7 53.1 98 35 1.6 0.0
Sedro-Woolley 69.9 49.3 91 28 2.9 0.0
Spokane 73.7 47.8 98 22 0.6 0.1
Stevens Pass 62.1 42.8 92 27 3.9 n/a
Vancouver 74.9 48.2 103 28 1.6 0.0
Walla Walla 78.7 53.6 104 32 0.6 0.0
Wenatchee 78.6 52.5 101 21 0.2 0.0
Winthrop 77.5 41.7 100 18 0.4 0.0
Yakima 79.2 44.9 100 18 0.2 0.0