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.

  • 16°C maximum daytime temperature in October in Keystone16
    16°C max day temperature
  • 7 hours of sunshine per day
  • 6 days with some rainfall in October in Keystone6
    6 days with some rainfall
  • 1°C minimum night-time temperature in October in Keystone1
    1°C min night temperature
  • 11 hours of daylight per day in October in Keystone11
    11 hours of daylight per day
  • No heat & humidity in October in Keystone0
    No heat & humidity
  • 25 mm monthly rainfall in October in Keystone25
    25 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in October in Keystone3
    3 (Moderate) UV index

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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)

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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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