Fort Collins weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Fort Collins in May. Check more long-term weather averages for Fort Collins in May before you book your next holiday to Colorado in 2025/2026.

  • 21°C maximum daytime temperature in May in Fort Collins21
    21°C max day temperature
  • 10 hours of sunshine per day
  • 11 days with some rainfall in May in Fort Collins11
    11 days with some rainfall
  • 6°C minimum night-time temperature in May in Fort Collins6
    6°C min night temperature
  • 14 hours of daylight per day in May in Fort Collins14
    14 hours of daylight per day
  • No heat & humidity in May in Fort Collins0
    No heat & humidity
  • 70 mm monthly rainfall in May in Fort Collins70
    70 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in May in Fort Collins9
    9 (Very High) UV index

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The May weather guide for Colorado (Fort Collins) 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 Fort Collins in May?

Daytime temperatures usually reach 21°C in Fort Collins in May, falling to 6°C at night.

How sunny is it in Fort Collins in May?

There are normally 10 hours of bright sunshine each day in Fort Collins in May - that's 66% of daylight hours.

Does it rain in Fort Collins in May?

There are usually 11 days with some rain in Fort Collins in May and the average monthly rainfall is 70mm.

Fort Collins May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:59 18:57
Friday, 16th May 2025 04:42 19:12
Saturday, 31st May 2025 04:32 19:25

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