Whitefish weather in September 2025

Expect 20°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Whitefish in September. Check more long-term weather averages for Whitefish in September before you book your next holiday to Montana in 2025/2026.

  • 20°C maximum daytime temperature in September in Whitefish20
    20°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Whitefish8
    8 days with some rainfall
  • 3°C minimum night-time temperature in September in Whitefish3
    3°C min night temperature
  • 13 hours of daylight per day in September in Whitefish13
    13 hours of daylight per day
  • No heat & humidity in September in Whitefish0
    No heat & humidity
  • 37 mm monthly rainfall in September in Whitefish37
    37 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Whitefish5
    5 (Moderate) UV index

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The September weather guide for Montana (Whitefish) 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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How hot is it in Whitefish in September?

Daytime temperatures usually reach 20°C in Whitefish in September, falling to 3°C at night.

How sunny is it in Whitefish in September?

There are normally 8 hours of bright sunshine each day in Whitefish in September - that's 60% of daylight hours.

Does it rain in Whitefish in September?

There are usually 8 days with some rain in Whitefish in September and the average monthly rainfall is 37mm.

Whitefish September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:55 19:18
Monday, 15th September 2025 06:15 18:49
Tuesday, 30th September 2025 06:36 18:18

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