Green River weather in May 2026

Expect daytime maximum temperatures of 18°C in Green River, Wyoming in May based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 18°C maximum daytime temperature in May in Green River18
    18°C max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in May in Green River9
    9 days with some rainfall
  • 1°C minimum night-time temperature in May in Green River1
    1°C min night temperature
  • 15 hours of daylight per day in May in Green River15
    15 hours of daylight per day
  • No heat & humidity in May in Green River0
    No heat & humidity
  • 31 mm monthly rainfall in May in Green River31
    31 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in Green River9
    9 (Very High) UV index

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The May weather guide for Wyoming (Green River) 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 Green River in May?

Daytime temperatures usually reach 18°C in Green River in May, falling to 1°C at night.

How sunny is it in Green River in May?

There are normally 10 hours of bright sunshine each day in Green River in May - that's 67% of daylight hours.

Does it rain in Green River in May?

There are usually 9 days with some rain in Green River in May and the average monthly rainfall is 31mm.

Green River May sunrise & sunset times

Browse the sunrise and sunset times for Green River in May 2026. Select a month to view Green River sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st May 2026 05:15 19:16
Saturday, 16th May 2026 04:58 19:32
Sunday, 31st May 2026 04:47 19:45

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