Keystone weather live forecast

Tomorrow's maximum temperature in Keystone is expected to be 22°C.

5-day weather forecast updated at 04:03 on Monday 7th July 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 7th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 22°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 10-20 mm of rainfall expected with 65% chance of some rain and a light breeze of 9 kph from the east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 15°C minimum temperature15
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 65% chance of some rain65
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 9 kph from the East9
    kph wind from E

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Keystone weather for Tuesday 8th July 2025

Expect scattered clouds in Keystone, South Dakota with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south-east.

  • 27°C maximum temperature27
    °C maximum temperature
  • 14°C minimum temperature14
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 13 hours of bright sunshine13
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Light breeze of 11 kph from the South-East11
    kph wind from SE

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Keystone weather for Wednesday 9th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 10 hours of bright sunshine. There are 5-10 mm of rainfall expected with 36% chance of some rain and a light breeze of 10 kph from the west.

  • 31°C maximum temperature31
    °C maximum temperature
  • 18°C minimum temperature18
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 36% chance of some rain36
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 10 kph from the West10
    kph wind from W

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Keystone weather for Thursday 10th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 15 kph from the north.

  • 27°C maximum temperature27
    °C maximum temperature
  • 17°C minimum temperature17
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 44% chance of some rain44
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 15 kph from the North15
    kph wind from N

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Keystone weather for Friday 11th July 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 20°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.

  • 20°C maximum temperature20
    °C maximum temperature
  • 13°C minimum temperature13
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 15 kph from the North-West15
    kph wind from NW

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

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