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September in
Washington_State (United States) is on average a very mild month, with a minimum
temperature of
8,6 °C, a maximum of
21,9 °C, and therefore a daily average of
15,3 °C.However, there are remarkable differences between night and day.
The minimum temperature is normally recorded before dawn, the maximum in the early afternoon.
Map with average temperatures.
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Table with the average temperatures
Washington_State - Average temperatures in September|
| City | Min | Max | Mean |
|---|
| Aberdeen | 10,6 | 20,4 | 15,5 |
|---|
| Bellingham | 9,8 | 20,1 | 14,9 |
|---|
Camp Muir
(3.075 m.) | -0,1 | 5,6 | 2,8 |
|---|
| Cape Disappointment | 8,8 | 18,9 | 13,8 |
|---|
| Centralia | 9,1 | 22,6 | 15,8 |
|---|
| Clearwater | 8 | 21,2 | 14,6 |
|---|
Colville
(475 m.) | 6,6 | 25,7 | 16,2 |
|---|
Ephrata
(400 m.) | 10,3 | 25,8 | 18,1 |
|---|
| Everett | 11,3 | 19,8 | 15,6 |
|---|
| Forks | 8,6 | 21,2 | 14,9 |
|---|
| Friday Harbor | 8,8 | 20,1 | 14,4 |
|---|
Grand Coulee Dam
(525 m.) | 10,3 | 24,9 | 17,6 |
|---|
| Hoh Rainforest | 8,6 | 19,2 | 13,9 |
|---|
| Kennewick | 11,8 | 26,9 | 19,4 |
|---|
| Longview | 9,8 | 24,3 | 17 |
|---|
| Olympia | 7,9 | 22,3 | 15,1 |
|---|
Paradise Station
(1.650 m.) | 5,1 | 14,1 | 9,6 |
|---|
| Port Angeles | 8,4 | 18,9 | 13,7 |
|---|
Pullman
(720 m.) | 7,4 | 23,4 | 15,4 |
|---|
Republic
(780 m.) | 3,3 | 23,4 | 13,4 |
|---|
Ritzville
(570 m.) | 7,8 | 24,8 | 16,3 |
|---|
| Seattle | 12 | 22 | 17 |
|---|
| Sequim | 7,9 | 18,8 | 13,4 |
|---|
Spokane
(600 m.) | 8,2 | 24,4 | 16,3 |
|---|
| Tacoma | 11,7 | 21,5 | 16,6 |
|---|
| Vancouver | 11,1 | 24,3 | 17,7 |
|---|
Walla Walla
(365 m.) | 12,2 | 25,8 | 19 |
|---|
Wenatchee
(380 m.) | 11,3 | 26 | 18,6 |
|---|
Winthrop
(600 m.) | 5,1 | 25 | 15,1 |
|---|
Yakima
(300 m.) | 7,2 | 26,3 | 16,8 |
|---|
Average
Washington_State | 8,6 | 21,9 | 15,3 |
|---|
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