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Weather in Spokane, Washington for September 2025

Your guide to Spokane weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • So far, September 2025 in Spokane is slightly warmer than the historical average by 1.5 °F.

  • The forecast for the next days in Spokane predicts a temperature of 24 °F, which is cooler than the historical average.

  • 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 19.1 °F by the end of September.

    • Rain 🌧️

  • With an average of 4 rainy days, Spokane experiences minimal rainfall in September.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
26
Dry days
Average rainy days
4
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
44 %
Avg humidity

Spokane Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Cloudy
34°
2
Overcast
33°
3
Sunny
31°
4
Sunny
29°
5
Sunny
29°
6
Cloudy
30°
7
Sunny
30°
8
Sunny
30°
9
Sunny
28°
10
Sunny
28°
11
Overcast
23°
12
Overcast
24°
13
Sunny
26°
14
Sunny
23°
15
Weather Alert Overcast
18°
16
Sunny
28°
17
Sunny
32°
18
Sunny
30°
19
Overcast
30°
20
Partly cloudy
25°
21
Sunny
22°
22
Sunny
22°
23
Sunny
27°
24
Partly cloudy
26°
25
Sunny
17°
26
Sunny
17°
27
Partly cloudy
19°
28
Patchy rain possible
23°
29
Patchy rain possible
16°
30
Light drizzle
16°

Temperatures trend during September in Spokane

See the weather trend as well as the moving average line

September weather in Spokane day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Cloudy
Cloudy
 34° /17° 0 mm 7
Sept. 2 Overcast
Overcast
 33° /19° 0 mm 7
Sept. 3 Sunny
Sunny
 31° /19° 0 mm 7
Sept. 4 Sunny
Sunny
 29° /17° 0 mm 7
Sept. 5 Sunny
Sunny
 29° /15° 0 mm 7
Sept. 6 Cloudy
Cloudy
 30° /15° 0 mm 7
Sept. 7 Sunny
Sunny
 30° /16° 2 mm 7
Sept. 8 Sunny
Sunny
 30° /16° 0 mm 7
Sept. 9 Sunny
Sunny
 28° /16° 2.6 mm 7
Sept. 10 Sunny
Sunny
 28° /15° 0 mm 7
Sept. 11 Overcast
Overcast
 23° /15° 8 mm 5
Sept. 12 Overcast
Overcast
 24° /13° 0.2 mm 5
Sept. 13 Sunny
Sunny
 26° /13° 0 mm 7
Sept. 14 Sunny
Sunny
 23° /12° 1.5 mm 6
Sept. 15 Overcast
Overcast
 18° /12° 0 mm 0.6
Sept. 16 Sunny
Sunny
 28° /11° 0 mm 1.3
Sept. 17 Sunny
Sunny
 32° /18° 0 mm 1.3
Sept. 18 Sunny
Sunny
 30° /18° 0 mm 1.3
Sept. 19 Overcast
Overcast
 30° /17° 0 mm 0
Sept. 20 Partly cloudy
Partly cloudy
 25° /16° 0 mm 6
Sept. 21 Sunny
Sunny
 22° /13° 0 mm 5
Sept. 22 Sunny
Sunny
 22° /13° 0 mm 5
Sept. 23 Sunny
Sunny
 27° /11° 0 mm 5
Sept. 24 Partly cloudy
Partly cloudy
 26° /18° 0 mm 6
Sept. 25 Sunny
Sunny
 17° /10° 0 mm 4
Sept. 26 Sunny
Sunny
 17° /7° 0 mm 4
Sept. 27 Partly cloudy
Partly cloudy
 19° /8° 0 mm 4
Sept. 28 Patchy rain possible
Patchy rain possible
 23° /8° 0.4 mm 3
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
Next
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 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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Location coordinates Where is Spokane?

Get accurate weather forecasts for Spokane, located at latitude 47.66 and longitude -117.429. Stay updated with localized weather information tailored for Spokane.

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