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Custer weather in May 2025
Expect daytime maximum temperatures of 19°C in Custer, South Dakota in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 12 days with some rainfall and typically 76 mm of rainfall in the month.
- 19°C max day temperature
19 - 9 hours of sunshine per day
- 12 days with some rainfall
12 - 4°C min night temperature
4 - 15 hours of daylight per day
15 - No heat & humidity
0 - 76 mm of monthly rainfall
76 - 8 (Very High) UV index
8
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Recommended for South Dakota
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 / mm) | Imperial (°F / inches)
More about the USA
How hot is it in Custer in May?
Daytime temperatures usually reach 19°C in Custer in May, falling to 4°C 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 76mm.
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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