Great Falls weather in October 2025

Expect 15°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Great Falls in October. Check more long-term weather averages for Great Falls in October before you book your next holiday to Montana in 2025/2026.

  • 15°C maximum daytime temperature in October in Great Falls15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 5 days with some rainfall in October in Great Falls5
    5 days with some rainfall
  • 2°C minimum night-time temperature in October in Great Falls2
    2°C min night temperature
  • 11 hours of daylight per day in October in Great Falls11
    11 hours of daylight per day
  • No heat & humidity in October in Great Falls0
    No heat & humidity
  • 19 mm monthly rainfall in October in Great Falls19
    19 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Great Falls3
    3 (Moderate) UV index

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The October weather guide for Montana (Great Falls) 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 warm is it in Great Falls in October?

Daytime temperatures usually reach 15°C in Great Falls in October, falling to 2°C at night.

How sunny is it in Great Falls in October?

There are normally 6 hours of bright sunshine each day in Great Falls in October - that's 59% of daylight hours.

Does it rain in Great Falls in October?

There are usually 5 days with some rain in Great Falls in October and the average monthly rainfall is 19mm.

Great Falls October sunrise & sunset times

Browse the sunrise and sunset times for Great Falls in October 2025. Select a month to view Great Falls sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:25 18:04
Thursday, 16th October 2025 06:46 17:35
Friday, 31st October 2025 07:08 17:09

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