Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 28°F. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

5-day weather forecast updated at 04:05 on Saturday 29th November 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 Friday 28th November 2025

Expect mostly cloudy with snow in Keystone, South Dakota with a maximum temperature of 28°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 5-10 cm of snow expected with 100% chance of some snow and a gentle breeze of 9 mph from the north.

  • 28°F maximum temperature28
    °F maximum temperature
  • 16°F minimum temperature16
    °F minimum temperature
  • Mostly cloudy with snow
    mostly cloudy with snow
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 100% chance of some snow100
    % chance of some snow
  • 5-10 cm of snow expected<10
    cm of snow expected
  • 19°F wind chill19
    °F wind chill
  • Gentle breeze of 9 mph from the North9
    mph wind from N

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Keystone weather for Saturday 29th November 2025

Expect clear skies with flurries of snow in Keystone, South Dakota with a maximum temperature of 21°F, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 22% chance of some snow and a moderate breeze of 14 mph from the north-west.

  • 21°F maximum temperature21
    °F maximum temperature
  • 5°F minimum temperature5
    °F minimum temperature
  • Clear skies with flurries of snow
    clear skies with flurries of snow
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 22% chance of some snow22
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 9°F wind chill9
    °F wind chill
  • Moderate breeze of 14 mph from the North-West14
    mph wind from NW

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Keystone weather for Sunday 30th November 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 19°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 cm of snow expected and a light breeze of 5 mph from the south.

  • 19°F maximum temperature19
    °F maximum temperature
  • 3°F minimum temperature3
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 cm of snow expected0
    cm of snow expected
  • 14°F wind chill14
    °F wind chill
  • Light breeze of 5 mph from the South5
    mph wind from S

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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 light breeze of 7 mph from the west.

  • 34°F maximum temperature34
    °F maximum temperature
  • 14°F minimum temperature14
    °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
  • Light breeze of 7 mph from the West7
    mph wind from W

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Keystone weather for Tuesday 2nd December 2025

Expect mostly cloudy with light snow in Keystone, South Dakota with a maximum temperature of 39°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 cm of snow expected with 40% chance of some snow and a light breeze of 7 mph from the west.

  • 39°F maximum temperature39
    °F maximum temperature
  • 25°F minimum temperature25
    °F minimum temperature
  • Mostly cloudy with light snow
    mostly cloudy with light snow
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 40% chance of some snow40
    % chance of some snow
  • 0-2 cm of snow expected<2
    cm of snow expected
  • 34°F wind chill34
    °F wind chill
  • Light breeze of 7 mph from the West7
    mph wind from W

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