Riverton weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Riverton in May. Check more long-term weather averages for Riverton in May before you book your next holiday to Wyoming in 2025/2026.

  • 21°C maximum daytime temperature in May in Riverton21
    21°C max day temperature
  • 9 hours of sunshine per day
  • 9 days with some rainfall in May in Riverton9
    9 days with some rainfall
  • 4°C minimum night-time temperature in May in Riverton4
    4°C min night temperature
  • 15 hours of daylight per day in May in Riverton15
    15 hours of daylight per day
  • No heat & humidity in May in Riverton0
    No heat & humidity
  • 45 mm monthly rainfall in May in Riverton45
    45 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Riverton8
    8 (Very High) UV index

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The May weather guide for Wyoming (Riverton) 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Riverton in May?

Daytime temperatures usually reach 21°C in Riverton in May, falling to 4°C at night.

How sunny is it in Riverton in May?

There are normally 9 hours of bright sunshine each day in Riverton in May - that's 64% of daylight hours.

Does it rain in Riverton in May?

There are usually 9 days with some rain in Riverton in May and the average monthly rainfall is 45mm.

Riverton May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:07 19:15
Friday, 16th May 2025 04:49 19:32
Saturday, 31st May 2025 04:37 19:46

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