Idaho Falls weather in August 2025

Expect 84°F daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Idaho Falls in August. Check more long-term weather averages for Idaho Falls in August before you book your next holiday to Idaho in 2025/2026.

  • 84°F maximum daytime temperature in August in Idaho Falls84
    84°F max day temperature
  • 11 hours of sunshine per day
  • 6 days with some rainfall in August in Idaho Falls6
    6 days with some rainfall
  • 48°F minimum night-time temperature in August in Idaho Falls48
    48°F min night temperature
  • 14 hours of daylight per day in August in Idaho Falls14
    14 hours of daylight per day
  • Low heat & humidity in August in Idaho FallsL
    Low heat & humidity
  • 0.7 inches monthly rainfall in August in Idaho Falls0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Idaho Falls8
    8 (Very High) UV index

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The August weather guide for Idaho (Idaho 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)  |  Imperial (°F)

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How hot is it in Idaho Falls in August?

Daytime temperatures usually reach 84°F in Idaho Falls in August with low heat and humidity, falling to 48°F at night.

How sunny is it in Idaho Falls in August?

There are normally 11 hours of bright sunshine each day in Idaho Falls in August - that's 79% of daylight hours.

Does it rain in Idaho Falls in August?

There are usually 6 days with some rain in Idaho Falls in August and the average monthly rainfall is 0.7 inches.

Idaho Falls August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:18 19:50
Saturday, 16th August 2025 05:35 19:29
Sunday, 31st August 2025 05:51 19:04

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