Keystone weather live forecast

Tomorrow's maximum temperature in Keystone is expected to be 70°F.

5-day weather forecast updated at 04:03 on Tuesday 15th 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 Tuesday 15th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 70°F, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 75% chance of some rain and a gentle breeze of 11 mph from the north.

  • 70°F maximum temperature70
    °F maximum temperature
  • 55°F minimum temperature55
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 75% chance of some rain75
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 70°F wind chill70
    °F wind chill
  • Gentle breeze of 11 mph from the North11
    mph wind from N

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Keystone weather for Wednesday 16th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 55°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 67% chance of some rain and a light breeze of 6 mph from the north-east.

  • 55°F maximum temperature55
    °F maximum temperature
  • 50°F minimum temperature50
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 67% chance of some rain67
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 55°F wind chill55
    °F wind chill
  • Light breeze of 6 mph from the North-East6
    mph wind from NE

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Keystone weather for Thursday 17th July 2025

Expect broken clouds in Keystone, South Dakota with a maximum temperature of 70°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south.

  • 70°F maximum temperature70
    °F maximum temperature
  • 48°F minimum temperature48
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 9 mph from the South9
    mph wind from S

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Keystone weather for Friday 18th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 79°F, maximum UV of 8 (Very High) and 11 hours of bright sunshine. There are 2-5 mm of rainfall expected with 35% chance of some rain and a light breeze of 7 mph from the north-east.

  • 79°F maximum temperature79
    °F maximum temperature
  • 61°F minimum temperature61
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 35% chance of some rain35
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 79°F wind chill79
    °F wind chill
  • Light breeze of 7 mph from the North-East7
    mph wind from NE

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Keystone weather for Saturday 19th July 2025

Expect isolated thunderstorms in Keystone, South Dakota with a maximum temperature of 77°F, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 48% chance of some rain and a light breeze of 7 mph from the south-east.

  • 77°F maximum temperature77
    °F maximum temperature
  • 59°F minimum temperature59
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 48% chance of some rain48
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • 77°F wind chill77
    °F wind chill
  • Light breeze of 7 mph from the South-East7
    mph wind from SE

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Metric (°C)  |  Imperial (°F)

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