Custer weather in May 2025

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

  • 66°F maximum daytime temperature in May in Custer66
    66°F max day temperature
  • 9 hours of sunshine per day
  • 12 days with some rainfall in May in Custer12
    12 days with some rainfall
  • 39°F minimum night-time temperature in May in Custer39
    39°F min night temperature
  • 15 hours of daylight per day in May in Custer15
    15 hours of daylight per day
  • No heat & humidity in May in Custer0
    No heat & humidity
  • 3.0 inches monthly rainfall in May in Custer3.0
    3.0 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in May in Custer8
    8 (Very High) UV index

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The May weather guide for South Dakota (Custer) 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 Custer in May?

Daytime temperatures usually reach 66°F in Custer in May, falling to 39°F at night.

How sunny is it in Custer in May?

There are normally 9 hours of bright sunshine each day in Custer in May - that's 58% of daylight hours.

Does it rain in Custer in May?

There are usually 12 days with some rain in Custer in May and the average monthly rainfall is 3.0 inches.

Custer May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 04:46 18:58
Friday, 16th May 2025 04:28 19:15
Saturday, 31st May 2025 04:16 19:29

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