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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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Average dry days
23
Dry days
Average rainy days
7
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/11°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
48 %
Avg humidity

Spokane County in September average weather

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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
Cloudy
31° /15° 0 mm 7
Sept. 2 Overcast
Overcast
30° /17° 0 mm 7
Sept. 3 Overcast
Overcast
26° /17° 0 mm 7
Sept. 4 Overcast
Overcast
26° /14° 0 mm 7
Sept. 5 Partly cloudy
Partly cloudy
28° /14° 0 mm 7
Sept. 6 Cloudy
Cloudy
29° /14° 0 mm 7
Sept. 7 Sunny
Sunny
29° /15° 0 mm 7
Sept. 8 Sunny
Sunny
31° /16° 0 mm 8
Sept. 9 Sunny
Sunny
29° /16° 0 mm 7
Sept. 10 Sunny
Sunny
28° /15° 0 mm 7
Sept. 11 Overcast
Overcast
23° /14° 0 mm 6
Sept. 12 Overcast
Overcast
23° /13° 0.2 mm 5
Sept. 13 Sunny
Sunny
24° /12° 0 mm 7
Sept. 14 Sunny
Sunny
24° /12° 0.1 mm 7
Sept. 15 Sunny
Sunny
25° /12° 0 mm 7
Sept. 16 Sunny
Sunny
29° /12° 0 mm 7
Sept. 17 Overcast
Overcast
22° /13° 6.8 mm 5
Sept. 18 Cloudy
Cloudy
24° /11° 0 mm 5
Sept. 19 Overcast
Overcast
23° /9° 0 mm 6
Sept. 20 Patchy light rain with thunder
Patchy light rain with thunder
18° /7° 0.4 mm 5
Sept. 21 Patchy light drizzle
Patchy light drizzle
19° /9° 0.6 mm 5
Sept. 22 Patchy rain possible
Patchy rain possible
22° /10° 0 mm 5
Sept. 23 Overcast
Overcast
23° /9° 0 mm 6
Sept. 24 Overcast
Overcast
24° /11° 0 mm 6
Sept. 25 Patchy rain possible
Patchy rain possible
28° /14° 0.1 mm 7
Sept. 26 Patchy light rain with thunder
Patchy light rain with thunder
19° /10° 2.4 mm 5
Sept. 27 Light rain shower
Light rain shower
19° /9° 3.3 mm 5
Sept. 28 Light rain shower
Light rain shower
20° /9° 2.6 mm 5
Sept. 29 Patchy rain possible
Patchy rain possible
16° /7° 0.3 mm 4
Sept. 30 Light drizzle
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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Location coordinates 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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