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Keystone weather in October 2026
Expect daytime maximum temperatures of 61°F in Keystone, South Dakota in October based on long-term weather averages. There are 7 hours of sunshine per day on average.
- 61°F max day temperature
61 - 7 hours of sunshine per day
- 6 days with some rainfall
6 - 34°F min night temperature
34 - 11 hours of daylight per day
11 - No heat & humidity
0 - 1.0 inches of monthly rainfall
1.0 - 3 (Moderate) UV index
3
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Recommended for South Dakota
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) | Imperial (°F)
More about the USA
How warm is it in Keystone in October?
Daytime temperatures usually reach 61°F in Keystone in October, falling to 36°F 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 60% 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 1.7 inches.
Keystone October sunrise & sunset times
Browse the sunrise and sunset times for Keystone in October 2026. Select a month to view Keystone sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
| Date | Sunrise times | Sunset times |
|---|---|---|
| Thursday, 1st October 2026 | 05:51 | 17:34 |
| Friday, 16th October 2026 | 06:10 | 17:08 |
| Saturday, 31st October 2026 | 06:29 | 16:45 |
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