Spokane County (Spokane)
September
Weather in Spokane County, Washington for September 2026
Your guide to Spokane County weather in September - trends and predictions
In general, the average temperature in Spokane County 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 County 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 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
25°/13°
Temperatures
14 km/h
Avg max wind
44 %
Avg humidity
Spokane County Weather September
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Temperatures trend during September in Spokane County
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September weather in Spokane County 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 County 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 County forecast closer to your planned date for the most up-to-date weather information.
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Spokane County in September - FAQ
What are the expected maximum and minimum temperatures in Spokane County 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 County during September?
In September, Spokane County 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 County during September?
The average wind speed in Spokane County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Spokane County
Explore the daily rainfall trends and prepare for Spokane Countys September weather 💧
Typically, Spokane County has 8 rainy days in September with a total of 25.7 mm of rainfall.
UV exposure in Spokane County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Spokane County?Get accurate weather forecasts for Spokane County, located at latitude 47.66 and longitude -117.429. Stay updated with localized weather information tailored for Spokane County.
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