The temperatures in Spokane in September are comfortable with low of 10°C and and high up to 23°C.
The wather in Spokane in September can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Spokane in September 2025.
If you’re planning to visit Spokane in the near future, we highly recommend that you review the 14 day weather forecast for Spokane before you arrive.
Temperatures
23° / 10°
Rainy Days
2
Snowy Days
0
Dry Days
27
Rainfall
35
mm
Sun Hours
11.4
Hrs
