Spokane (WA)
September
Weather in Spokane, Washington for September 2026
Your guide to Spokane weather in September - trends and predictions
In general, the average temperature in Spokane at the beginning of September is 30.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.7 °C by the end of September.
Spokane experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 25.7 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
25°/13°
Temperatures
14 km/h
Avg max wind
44 %
Avg humidity
Spokane Weather September
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Temperatures trend during September in Spokane
See the weather trend as well as the moving average line
September weather in Spokane day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Cloudy | 34° /17° | 0 mm | 7 | |
| Sept. 2 |  Overcast | 33° /19° | 0 mm | 7 | |
| Sept. 3 |  Sunny | 31° /19° | 0 mm | 7 | |
| Sept. 4 | Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 5 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 6 | Cloudy | 30° /15° | 0 mm | 7 | |
| Sept. 7 | Sunny | 30° /16° | 2 mm | 7 | |
| Sept. 8 | Sunny | 30° /16° | 0 mm | 7 | |
| Sept. 9 | Sunny | 28° /16° | 2.6 mm | 7 | |
| Sept. 10 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 11 | Overcast | 23° /15° | 8 mm | 5 | |
| Sept. 12 | Overcast | 24° /13° | 0.2 mm | 5 | |
| Sept. 13 | Sunny | 26° /13° | 0 mm | 7 | |
| Sept. 14 | Sunny | 23° /12° | 1.5 mm | 6 | |
| Sept. 15 | Sunny | 24° /11° | 0 mm | 6 | |
| Sept. 16 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 17 | Overcast | 25° /14° | 4.5 mm | 6 | |
| Sept. 18 | Cloudy | 27° /13° | 0 mm | 6 | |
| Sept. 19 | Sunny | 26° /11° | 0 mm | 6 | |
| Sept. 20 | Sunny | 22° /10° | 0.3 mm | 6 | |
| Sept. 21 |  Patchy light drizzle | 19° /11° | 0.4 mm | 4 | |
| Sept. 22 |  Patchy rain possible | 22° /9° | 0 mm | 5 | |
| Sept. 23 | Sunny | 25° /9° | 0 mm | 6 | |
| Sept. 24 | Sunny | 26° /12° | 0 mm | 7 | |
| Sept. 25 | Patchy rain possible | 28° /14° | 0 mm | 7 | |
| Sept. 26 |  Patchy light rain with thunder | 20° /9° | 1.6 mm | 5 | |
| Sept. 27 | Light rain shower | 21° /9° | 2.2 mm | 5 | |
| Sept. 28 | Light rain shower | 23° /11° | 1.8 mm | 5 | |
| Sept. 29 | Overcast | 17° /9° | 0.2 mm | 4 | |
| Sept. 30 | Light drizzle | 17° /7° | 0.3 mm | 4 | |
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Important Notice
Our weather forecast for Spokane in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Spokane forecast closer to your planned date for the most up-to-date weather information.
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Spokane in September - FAQ
What are the expected maximum and minimum temperatures in Spokane during September?
Enjoy moderate daytime temperatures of up to 25° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Spokane during September?
In September, Spokane can expect light to moderate rainfall, totaling 25.7 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Spokane during September?
The average wind speed in Spokane during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Spokane
Explore the daily rainfall trends and prepare for Spokanes September weather 💧
Typically, Spokane has 8 rainy days in September with a total of 25.7 mm of rainfall.
UV exposure in Spokane during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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