Lewiston weather in May 2025

Expect 70°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Lewiston in May. Check more long-term weather averages for Lewiston in May before you book your next holiday to Idaho in 2025/2026.

  • 70°F maximum daytime temperature in May in Lewiston70
    70°F max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in May in Lewiston9
    9 days with some rainfall
  • 45°F minimum night-time temperature in May in Lewiston45
    45°F min night temperature
  • 15 hours of daylight per day in May in Lewiston15
    15 hours of daylight per day
  • No heat & humidity in May in Lewiston0
    No heat & humidity
  • 1.5 inches monthly rainfall in May in Lewiston1.5
    1.5 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Lewiston7
    7 (High) UV index

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The May weather guide for Idaho (Lewiston) 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 Lewiston in May?

Daytime temperatures usually reach 70°F in Lewiston in May, falling to 45°F at night.

How sunny is it in Lewiston in May?

There are normally 9 hours of bright sunshine each day in Lewiston in May - that's 61% of daylight hours.

Does it rain in Lewiston in May?

There are usually 9 days with some rain in Lewiston in May and the average monthly rainfall is 1.5 inches.

Lewiston May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:33 18:58
Friday, 16th May 2025 04:13 19:17
Saturday, 31st May 2025 04:00 19:33

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