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Custer weather in September 2025
Expect 22°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Custer in September. Check more long-term weather averages for Custer in September before you book your next holiday to South Dakota in 2025/2026.
- 2222°C max day temperature
- 8 hours of sunshine per day
- 88 days with some rainfall
- 66°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 3232 mm of monthly rainfall
- 66 (High) UV index
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Recommended for South Dakota
The September 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 September?
Daytime temperatures usually reach 22°C in Custer in September, falling to 6°C at night.
How sunny is it in Custer in September?
There are normally 8 hours of bright sunshine each day in Custer in September - that's 67% of daylight hours.
Does it rain in Custer in September?
There are usually 8 days with some rain in Custer in September and the average monthly rainfall is 32mm.
Custer September sunrise & sunset times
Browse the sunrise and sunset times for Custer in September 2025. Select a month to view Custer sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:18 | 18:29 |
Monday, 15th September 2025 | 05:34 | 18:04 |
Tuesday, 30th September 2025 | 05:51 | 17:36 |
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