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South Dakota weather in May 2025
Expect 22°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in South Dakota in May. Check more long-term weather averages for South Dakota in May before you book your next holiday to South Dakota in 2025/2026.
- 2222°C max day temperature
- 9 hours of sunshine per day
- 1111 days with some rainfall
- 88°C min night temperature
- 1515 hours of daylight per day
- 0No heat & humidity
- 7979 mm of monthly rainfall
- 77 (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.
Top South Dakota destinations
Below are average maximum temperatures at popular countries, regions and places in South Dakota in May. Select a holiday destination to see more weather parameters.
All South Dakota destinations
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
How hot is it in South Dakota in May?
Daytime temperatures usually reach 22°C in Sioux Falls, South Dakota in May, falling to 8°C at night.
How sunny is it in South Dakota in May?
There are normally 9 hours of bright sunshine each day in Sioux Falls, South Dakota in May - that's 62% of daylight hours.
Does it rain in South Dakota in May?
There are usually 11 days with some rain in Sioux Falls, South Dakota in May and the average monthly rainfall is 79mm.
South Dakota May sunrise & sunset times
Browse the sunrise and sunset times for South Dakota in May 2025. Select a month to view South Dakota sunrise and sunset times for the next 12 months. The South Dakota sunrise and sunset times shown below are for Sioux Falls.
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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