Idaho Falls weather in May 2025

Expect 66°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Idaho Falls in May. Check more long-term weather averages for Idaho Falls in May before you book your next holiday to Idaho in 2025/2026.

  • 66°F maximum daytime temperature in May in Idaho Falls66
    66°F max day temperature
  • 10 hours of sunshine per day
  • 10 days with some rainfall in May in Idaho Falls10
    10 days with some rainfall
  • 39°F minimum night-time temperature in May in Idaho Falls39
    39°F min night temperature
  • 15 hours of daylight per day in May in Idaho Falls15
    15 hours of daylight per day
  • No heat & humidity in May in Idaho Falls0
    No heat & humidity
  • 1.4 inches monthly rainfall in May in Idaho Falls1.4
    1.4 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Idaho Falls8
    8 (Very High) UV index

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The May 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 May?

Daytime temperatures usually reach 66°F in Idaho Falls in May, falling to 39°F at night.

How sunny is it in Idaho Falls in May?

There are normally 10 hours of bright sunshine each day in Idaho Falls in May - that's 66% of daylight hours.

Does it rain in Idaho Falls in May?

There are usually 10 days with some rain in Idaho Falls in May and the average monthly rainfall is 1.4 inches.

Idaho Falls May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:20 19:31
Friday, 16th May 2025 05:02 19:48
Saturday, 31st May 2025 04:50 20:02

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