Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 34°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

5-day weather forecast updated at 04:04 on Monday 1st December 2025 GMT

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The 5-day weather forecast for South Dakota (Keystone) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Keystone weather forecast by day

Below are the detailed weather forecasts for Keystone for the next 5 days.

Keystone weather for Monday 1st December 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 34°F, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the west.

  • 34°F maximum temperature34
    °F maximum temperature
  • 16°F minimum temperature16
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 27°F wind chill27
    °F wind chill
  • Gentle breeze of 8 mph from the West8
    mph wind from W

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Keystone weather for Tuesday 2nd December 2025

Expect overcast skies in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-west.

  • 39°F maximum temperature39
    °F maximum temperature
  • 27°F minimum temperature27
    °F minimum temperature
  • Overcast skies
    overcast skies
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 34°F wind chill34
    °F wind chill
  • Light breeze of 7 mph from the North-West7
    mph wind from NW

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Keystone weather for Wednesday 3rd December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 27°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 6 mph from the north.

  • 27°F maximum temperature27
    °F maximum temperature
  • 16°F minimum temperature16
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • 19°F wind chill19
    °F wind chill
  • Light breeze of 6 mph from the North6
    mph wind from N

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Keystone weather for Thursday 4th December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 37°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

  • 37°F maximum temperature37
    °F maximum temperature
  • 19°F minimum temperature19
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 30°F wind chill30
    °F wind chill
  • Gentle breeze of 9 mph from the West9
    mph wind from W

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Keystone weather for Friday 5th December 2025

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 37°F, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 10 mph from the north-west.

  • 37°F maximum temperature37
    °F maximum temperature
  • 27°F minimum temperature27
    °F minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 25% chance of some snow25
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 30°F wind chill30
    °F wind chill
  • Gentle breeze of 10 mph from the North-West10
    mph wind from NW

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