Missoula weather in August 2025

Expect 28°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Missoula in August. Check more long-term weather averages for Missoula in August before you book your next holiday to Montana in 2025/2026.

  • 28°C maximum daytime temperature in August in Missoula28
    28°C max day temperature
  • 11 hours of sunshine per day
  • 8 days with some rainfall in August in Missoula8
    8 days with some rainfall
  • 9°C minimum night-time temperature in August in Missoula9
    9°C min night temperature
  • 14 hours of daylight per day in August in Missoula14
    14 hours of daylight per day
  • Low heat & humidity in August in MissoulaL
    Low heat & humidity
  • 31 mm monthly rainfall in August in Missoula31
    31 mm of monthly rainfall
  • UV (maximum) index 7 (High) in August in Missoula7
    7 (High) UV index

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The August weather guide for Montana (Missoula) 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 Missoula in August?

Daytime temperatures usually reach 28°C in Missoula in August with low heat and humidity, falling to 9°C at night.

How sunny is it in Missoula in August?

There are normally 11 hours of bright sunshine each day in Missoula in August - that's 76% of daylight hours.

Does it rain in Missoula in August?

There are usually 8 days with some rain in Missoula in August and the average monthly rainfall is 31mm.

Missoula August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:16 20:08
Saturday, 16th August 2025 05:35 19:44
Sunday, 31st August 2025 05:55 19:17

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