Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 13°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

  • Sunday
    16th Nov
    Scattered clouds
  • Monday
    17th Nov
    Overcast skies
  • Tuesday
    18th Nov
    Fog in low lying areas
  • Wednesday
    19th Nov
    Mostly cloudy with light rain (2-5 mm of rainfall expected)
  • Thursday
    20th Nov
    Mostly cloudy with light rain (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:03 on Sunday 16th 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 Sunday 16th November 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 13°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-east.

  • 13°C maximum temperature13
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 11 kph from the South-East11
    kph wind from SE

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Keystone weather for Monday 17th November 2025

Expect overcast skies in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north.

  • 9°C maximum temperature9
    °C maximum temperature
  • 5°C minimum temperature5
    °C 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
  • 8°C wind chill8
    °C wind chill
  • Light breeze of 10 kph from the North10
    kph wind from N

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Keystone weather for Tuesday 18th November 2025

Expect fog in low lying areas in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-east.

  • 9°C maximum temperature9
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Fog in low lying areas
    fog in low lying areas
  • 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
  • 8°C wind chill8
    °C wind chill
  • Light breeze of 7 kph from the South-East7
    kph wind from SE

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Keystone weather for Wednesday 19th November 2025

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 11°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 38% chance of some rain and a light breeze of 7 kph from the west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 4°C minimum temperature4
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 2 hours of bright sunshine2
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 38% chance of some rain38
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 11°C wind chill11
    °C wind chill
  • Light breeze of 7 kph from the West7
    kph wind from W

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Keystone weather for Thursday 20th November 2025

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 7°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 27% chance of some rain and a light breeze of 9 kph from the north.

  • 7°C maximum temperature7
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 27% chance of some rain27
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Light breeze of 9 kph from the North9
    kph wind from N

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Metric (°C / mm)  |  Imperial (°F / inches)

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