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 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.7 °F by the end of September.
With an average of 4 rainy days, Spokane experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
24°/12°
Temperatures
15 km/h
Avg max wind
44 %
Avg humidity
Spokane Weather September
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Temperatures trend during September in Spokane
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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.
Change Month
Spokane in September - FAQ
What are the expected maximum and minimum temperatures in Spokane during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Spokane during September?
Expect minimal rainfall in Spokane during September, with a total of 17.4 mm over approximately 4 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Spokane during September?
The average wind speed in Spokane during September is 15 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 💧
UV exposure in Spokane during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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