Spokane County (Spokane)
September
Weather in Spokane County for September 2025
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 28.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.3 °F by the end of September.
Spokane County sees moderate rainfall in September, averaging 7 rainy days.
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23
Dry days
7
Rainy days
0
Snow days
23°/11°
Temperatures
14 km/h
Avg max wind
48 %
Avg humidity
Spokane County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  31° | 2  30° | 3 26° | 4 26° | 5  28° | 6 29° | 7  29° |
| 8 31° | 9 29° | 10 28° | 11 23° | 12 23° | 13 24° | 14 24° |
| 15 25° | 16 29° | 17 22° | 18 24° | 19 23° | 20  18° | 21  19° |
| 22  22° | 23 23° | 24 24° | 25 28° | 26 19° | 27 19° | 28 20° |
| 29 16° | 30 16° |
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Temperatures trend during September in Spokane County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Cloudy | 31° /15° | 0 mm | 7 | |
| Sept. 2 | Overcast | 30° /17° | 0 mm | 7 | |
| Sept. 3 | Overcast | 26° /17° | 0 mm | 7 | |
| Sept. 4 | Overcast | 26° /14° | 0 mm | 7 | |
| Sept. 5 | Partly cloudy | 28° /14° | 0 mm | 7 | |
| Sept. 6 | Cloudy | 29° /14° | 0 mm | 7 | |
| Sept. 7 | Sunny | 29° /15° | 0 mm | 7 | |
| Sept. 8 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 9 | Sunny | 29° /16° | 0 mm | 7 | |
| Sept. 10 | Sunny | 28° /15° | 0 mm | 7 | |
| Sept. 11 | Overcast | 23° /14° | 0 mm | 6 | |
| Sept. 12 | Overcast | 23° /13° | 0.2 mm | 5 | |
| Sept. 13 | Sunny | 24° /12° | 0 mm | 7 | |
| Sept. 14 | Sunny | 24° /12° | 0.1 mm | 7 | |
| Sept. 15 | Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 16 | Sunny | 29° /12° | 0 mm | 7 | |
| Sept. 17 | Overcast | 22° /13° | 6.8 mm | 5 | |
| Sept. 18 | Cloudy | 24° /11° | 0 mm | 5 | |
| Sept. 19 | Overcast | 23° /9° | 0 mm | 6 | |
| Sept. 20 | Patchy light rain with thunder | 18° /7° | 0.4 mm | 5 | |
| Sept. 21 | Patchy light drizzle | 19° /9° | 0.6 mm | 5 | |
| Sept. 22 | Patchy rain possible | 22° /10° | 0 mm | 5 | |
| Sept. 23 | Overcast | 23° /9° | 0 mm | 6 | |
| Sept. 24 | Overcast | 24° /11° | 0 mm | 6 | |
| Sept. 25 | Patchy rain possible | 28° /14° | 0.1 mm | 7 | |
| Sept. 26 | Patchy light rain with thunder | 19° /10° | 2.4 mm | 5 | |
| Sept. 27 | Light rain shower | 19° /9° | 3.3 mm | 5 | |
| Sept. 28 | Light rain shower | 20° /9° | 2.6 mm | 5 | |
| Sept. 29 | Patchy rain possible | 16° /7° | 0.3 mm | 4 | |
| Sept. 30 | Light drizzle | 16° /4° | 0.5 mm | 5 | |
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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.
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 23° and cooler nights around 11°. 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 20.7 mm across approximately 7 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 💧
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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