Spokane weather in September 2025

Expect 23°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Spokane in September. Check more long-term weather averages for Spokane in September before you book your next holiday to Washington State in 2025/2026.

  • 23°C maximum daytime temperature in September in Spokane23
    23°C max day temperature
  • 9 hours of sunshine per day
  • 6 days with some rainfall in September in Spokane6
    6 days with some rainfall
  • 8°C minimum night-time temperature in September in Spokane8
    8°C min night temperature
  • 13 hours of daylight per day in September in Spokane13
    13 hours of daylight per day
  • No heat & humidity in September in Spokane0
    No heat & humidity
  • 21 mm monthly rainfall in September in Spokane21
    21 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Spokane5
    5 (Moderate) UV index

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The September weather guide for Washington State (Spokane) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How hot is it in Spokane in September?

Daytime temperatures usually reach 23°C in Spokane in September, falling to 8°C at night.

How sunny is it in Spokane in September?

There are normally 9 hours of bright sunshine each day in Spokane in September - that's 69% of daylight hours.

Does it rain in Spokane in September?

There are usually 6 days with some rain in Spokane in September and the average monthly rainfall is 21mm.

Spokane September sunrise & sunset times

Browse the sunrise and sunset times for Spokane in September 2025. Select a month to view Spokane sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:09 18:29
Monday, 15th September 2025 05:27 18:01
Tuesday, 30th September 2025 05:48 17:30

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