Casper weather in May 2025

Expect 66°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Casper in May. Check more long-term weather averages for Casper in May before you book your next holiday to Wyoming in 2025/2026.

  • 66°F maximum daytime temperature in May in Casper66
    66°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Casper11
    11 days with some rainfall
  • 37°F minimum night-time temperature in May in Casper37
    37°F min night temperature
  • 15 hours of daylight per day in May in Casper15
    15 hours of daylight per day
  • No heat & humidity in May in Casper0
    No heat & humidity
  • 2.2 inches monthly rainfall in May in Casper2.2
    2.2 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Casper8
    8 (Very High) UV index

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The May weather guide for Wyoming (Casper) 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 Casper in May?

Daytime temperatures usually reach 66°F in Casper in May, falling to 37°F at night.

How sunny is it in Casper in May?

There are normally 9 hours of bright sunshine each day in Casper in May - that's 63% of daylight hours.

Does it rain in Casper in May?

There are usually 11 days with some rain in Casper in May and the average monthly rainfall is 2.2 inches.

Casper May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:59 19:06
Friday, 16th May 2025 04:41 19:23
Saturday, 31st May 2025 04:30 19:37

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