Keystone weather live forecast

Today's maximum temperature in Keystone is expected to be 3°C. Select a day from the live weather forecast for Keystone, South Dakota, USA for more weather parameters.

  • Saturday
    6th Dec
    Broken clouds
  • Sunday
    7th Dec
    Cloudy with sleet or snow (0-2 mm of rainfall expected)
  • Monday
    8th Dec
    Broken clouds
  • Tuesday
    9th Dec
    Sunshine and showers (0-2 mm of rainfall expected)
  • Wednesday
    10th Dec
    Mostly cloudy with light rain (0-2 mm of rainfall expected)

5-day weather forecast updated at 04:04 on Saturday 6th 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 Saturday 6th December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 3°C and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 4 hours of bright sunshine4
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • -1°C wind chill-1
    °C wind chill
  • Light breeze of 12 kph from the North-West12
    kph wind from NW

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Keystone weather for Sunday 7th December 2025

Expect cloudy with sleet or snow in Keystone, South Dakota with a maximum temperature of 3°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 6% chance of some sleet or snow and a gentle breeze of 17 kph from the west.

  • 3°C maximum temperature3
    °C maximum temperature
  • -7°C minimum temperature-7
    °C minimum temperature
  • Cloudy with sleet or snow
    cloudy with sleet or snow
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 6% chance of some sleet or snow6
    % chance of some sleet or snow
  • 0-2 mm of sleet/snow expected<2
    mm of sleet/snow expected
  • -1°C wind chill-1
    °C wind chill
  • Gentle breeze of 17 kph from the West17
    kph wind from W

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Keystone weather for Monday 8th December 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 6°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the west.

  • 6°C maximum temperature6
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 3°C wind chill3
    °C wind chill
  • Gentle breeze of 16 kph from the West16
    kph wind from W

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Keystone weather for Tuesday 9th December 2025

Expect sunshine and showers in Keystone, South Dakota with a maximum temperature of 9°C, maximum UV of 1 (Low) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 50% chance of some rain and a moderate breeze of 28 kph from the north-west.

  • 9°C maximum temperature9
    °C maximum temperature
  • 1°C minimum temperature1
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 1 (Low)1
    UV index (Low)
  • 50% chance of some rain50
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 5°C wind chill5
    °C wind chill
  • Moderate breeze of 28 kph from the North-West28
    kph wind from NW

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Keystone weather for Wednesday 10th December 2025

Expect mostly cloudy with light rain in Keystone, South Dakota with a maximum temperature of 4°C and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 17 kph from the west.

  • 4°C maximum temperature4
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • No UV (maximum) index0
    UV index (None)
  • 44% chance of some rain44
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 1°C wind chill1
    °C wind chill
  • Gentle breeze of 17 kph from the West17
    kph wind from W

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

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