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Keystone weather in October 2025
Expect 16°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Keystone in October. Check more long-term weather averages for Keystone in October before you book your next holiday to South Dakota in 2025/2026.
- 1616°C max day temperature
- 7 hours of sunshine per day
- 66 days with some rainfall
- 11°C min night temperature
- 1111 hours of daylight per day
- 0No heat & humidity
- 2525 mm of monthly rainfall
- 33 (Moderate) UV index
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Expires at 23:59 on Wednesday 31st Dec 2025 · View all Avalon Waterways offers
The October weather guide for South Dakota (Keystone) 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 warm is it in Keystone in October?
Daytime temperatures usually reach 16°C in Keystone in October, falling to 1°C at night.
How sunny is it in Keystone in October?
There are normally 7 hours of bright sunshine each day in Keystone in October - that's 65% of daylight hours.
Does it rain in Keystone in October?
There are usually 6 days with some rain in Keystone in October and the average monthly rainfall is 25mm.
Keystone October sunrise & sunset times
Browse the sunrise and sunset times for Keystone in October 2025. Select a month to view Keystone sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Wednesday, 1st October 2025 | 05:52 | 17:34 |
Thursday, 16th October 2025 | 06:10 | 17:08 |
Friday, 31st October 2025 | 06:29 | 16:45 |
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