East Glacier Park weather in September 2025

Expect 18°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in East Glacier Park in September. Check more long-term weather averages for East Glacier Park in September before you book your next holiday to Montana in 2025/2026.

  • 18°C maximum daytime temperature in September in East Glacier Park18
    18°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in East Glacier Park8
    8 days with some rainfall
  • 3°C minimum night-time temperature in September in East Glacier Park3
    3°C min night temperature
  • 13 hours of daylight per day in September in East Glacier Park13
    13 hours of daylight per day
  • No heat & humidity in September in East Glacier Park0
    No heat & humidity
  • 41 mm monthly rainfall in September in East Glacier Park41
    41 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in East Glacier Park5
    5 (Moderate) UV index

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East Glacier Park by month

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The September weather guide for Montana (East Glacier Park) 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 East Glacier Park in September?

Daytime temperatures usually reach 18°C in East Glacier Park in September, falling to 3°C at night.

How sunny is it in East Glacier Park in September?

There are normally 7 hours of bright sunshine each day in East Glacier Park in September - that's 57% of daylight hours.

Does it rain in East Glacier Park in September?

There are usually 8 days with some rain in East Glacier Park in September and the average monthly rainfall is 41mm.

East Glacier Park September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:51 19:14
Monday, 15th September 2025 06:10 18:45
Tuesday, 30th September 2025 06:31 18:13

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