Idaho weather in August 2025

Expect 31°C daytime maximum temperatures in the shade with on average 12 hours of sunshine per day in Idaho in August. Check more long-term weather averages for Idaho in August before you book your next holiday to Idaho in 2025/2026.

  • 31°C maximum daytime temperature in August in Idaho (Boise)31
    31°C max day temperature
  • 12 hours of sunshine per day
  • 3 days with some rainfall in August in Idaho (Boise)3
    3 days with some rainfall
  • 13°C minimum night-time temperature in August in Idaho (Boise)13
    13°C min night temperature
  • 14 hours of daylight per day in August in Idaho (Boise)14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Idaho (Boise)M
    Moderate heat & humidity
  • 10 mm monthly rainfall in August in Idaho (Boise)10
    10 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Idaho (Boise)8
    8 (Very High) UV index

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The August weather guide for Idaho (Boise) 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 Idaho destinations

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

All Idaho destinations

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

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How hot is it in Idaho in August?

Daytime temperatures usually reach 31°C in Boise, Idaho in August with moderate heat and humidity, falling to 13°C at night.

How sunny is it in Idaho in August?

There are normally 12 hours of bright sunshine each day in Boise, Idaho in August - that's 83% of daylight hours.

Does it ever rain in Idaho in August?

There are usually 3 days with some rain in Boise, Idaho in August and the average monthly rainfall is 10mm.

Idaho August sunrise & sunset times

Browse the sunrise and sunset times for Idaho in August 2025. Select a month to view Idaho sunrise and sunset times for the next 12 months. The Idaho sunrise and sunset times shown below are for Boise.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:35 20:07
Saturday, 16th August 2025 05:51 19:46
Sunday, 31st August 2025 06:08 19:21

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