Grand Junction weather in May 2025

Expect 24°C daytime maximum temperatures in the shade with on average 11 hours of sunshine per day in Grand Junction in May. Check more long-term weather averages for Grand Junction in May before you book your next holiday to Colorado in 2025/2026.

  • 24°C maximum daytime temperature in May in Grand Junction24
    24°C max day temperature
  • 11 hours of sunshine per day
  • 6 days with some rainfall in May in Grand Junction6
    6 days with some rainfall
  • 8°C minimum night-time temperature in May in Grand Junction8
    8°C min night temperature
  • 14 hours of daylight per day in May in Grand Junction14
    14 hours of daylight per day
  • No heat & humidity in May in Grand Junction0
    No heat & humidity
  • 22 mm monthly rainfall in May in Grand Junction22
    22 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in Grand Junction9
    9 (Very High) UV index

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The May weather guide for Colorado (Grand Junction) 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 Grand Junction in May?

Daytime temperatures usually reach 24°C in Grand Junction in May, falling to 8°C at night.

How sunny is it in Grand Junction in May?

There are normally 11 hours of bright sunshine each day in Grand Junction in May - that's 74% of daylight hours.

Does it rain in Grand Junction in May?

There are usually 6 days with some rain in Grand Junction in May and the average monthly rainfall is 22mm.

Grand Junction May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:16 19:08
Friday, 16th May 2025 05:00 19:22
Saturday, 31st May 2025 04:51 19:34

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