Hamilton weather in August 2025

Expect 82°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Hamilton in August. Check more long-term weather averages for Hamilton in August before you book your next holiday to Montana in 2025/2026.

  • 82°F maximum daytime temperature in August in Hamilton82
    82°F max day temperature
  • 11 hours of sunshine per day
  • 8 days with some rainfall in August in Hamilton8
    8 days with some rainfall
  • 46°F minimum night-time temperature in August in Hamilton46
    46°F min night temperature
  • 14 hours of daylight per day in August in Hamilton14
    14 hours of daylight per day
  • Low heat & humidity in August in HamiltonL
    Low heat & humidity
  • 1.1 inches monthly rainfall in August in Hamilton1.1
    1.1 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Hamilton8
    8 (Very High) UV index

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The August weather guide for Montana (Hamilton) 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)  |  Imperial (°F)

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How hot is it in Hamilton in August?

Daytime temperatures usually reach 82°F in Hamilton in August with low heat and humidity, falling to 46°F at night.

How sunny is it in Hamilton in August?

There are normally 11 hours of bright sunshine each day in Hamilton in August - that's 77% of daylight hours.

Does it rain in Hamilton in August?

There are usually 8 days with some rain in Hamilton in August and the average monthly rainfall is 1.1 inches.

Hamilton August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:19 20:06
Saturday, 16th August 2025 05:37 19:43
Sunday, 31st August 2025 05:56 19:16

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