Sioux Falls weather in May 2025

Expect 72°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Sioux Falls in May. Check more long-term weather averages for Sioux Falls in May before you book your next holiday to South Dakota in 2025/2026.

  • 72°F maximum daytime temperature in May in Sioux Falls72
    72°F max day temperature
  • 9 hours of sunshine per day
  • 11 days with some rainfall in May in Sioux Falls11
    11 days with some rainfall
  • 46°F minimum night-time temperature in May in Sioux Falls46
    46°F min night temperature
  • 15 hours of daylight per day in May in Sioux Falls15
    15 hours of daylight per day
  • No heat & humidity in May in Sioux Falls0
    No heat & humidity
  • 3.1 inches monthly rainfall in May in Sioux Falls3.1
    3.1 inches of monthly rainfall
  • UV (maximum) index 7 (High) in May in Sioux Falls7
    7 (High) UV index

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The May weather guide for South Dakota (Sioux Falls) 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 Sioux Falls in May?

Daytime temperatures usually reach 72°F in Sioux Falls in May, falling to 46°F at night.

How sunny is it in Sioux Falls in May?

There are normally 9 hours of bright sunshine each day in Sioux Falls in May - that's 62% of daylight hours.

Does it rain in Sioux Falls in May?

There are usually 11 days with some rain in Sioux Falls in May and the average monthly rainfall is 3.1 inches.

Sioux Falls May sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:19 19:30
Friday, 16th May 2025 05:01 19:47
Saturday, 31st May 2025 04:49 20:01

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