Montana weather in October 2025

Expect 14°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Montana in October. Check more long-term weather averages for Montana in October before you book your next holiday to Montana in 2025/2026.

  • 14°C maximum daytime temperature in October in Montana (Helena)14
    14°C max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in October in Montana (Helena)6
    6 days with some rainfall
  • -1°C minimum night-time temperature in October in Montana (Helena)-1
    -1°C min night temperature
  • 11 hours of daylight per day in October in Montana (Helena)11
    11 hours of daylight per day
  • No heat & humidity in October in Montana (Helena)0
    No heat & humidity
  • 19 mm monthly rainfall in October in Montana (Helena)19
    19 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Montana (Helena)3
    3 (Moderate) UV index

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The October weather guide for Montana (Helena) 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.

Top Montana destinations

Below are average maximum temperatures at popular countries, regions and places in Montana in October. Select a holiday destination to see more weather parameters.

All Montana destinations

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

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How warm is it in Montana in October?

Daytime temperatures usually reach 14°C in Helena, Montana in October, falling to -1°C at night.

How sunny is it in Montana in October?

There are normally 7 hours of bright sunshine each day in Helena, Montana in October - that's 60% of daylight hours.

Does it rain in Montana in October?

There are usually 6 days with some rain in Helena, Montana in October and the average monthly rainfall is 19mm.

Montana October sunrise & sunset times

Browse the sunrise and sunset times for Montana in October 2025. Select a month to view Montana sunrise and sunset times for the next 12 months. The Montana sunrise and sunset times shown below are for Helena.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:27 18:07
Thursday, 16th October 2025 06:48 17:39
Friday, 31st October 2025 07:09 17:14

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