Keystone, South Dakota | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Friday
    Mostly Sunny
    64°
    Forecast night icon
    Night
    Mostly Clear
    44°
    Friday 5/10
    Day
    64°
    Mostly Sunny
    Forecast day icon
    Night
    44°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. High temperature around 64F. Dew point will be around 36F with an average humidity of 47%. Winds will be 12 mph from the N.
    Night Details
    Mostly clear. Lows in the upper 30s. Northwest winds 5 to 10 mph. Gusts up to 20 mph this evening.
  • Forecast day icon
    Saturday
    Sunny
    69°
    Forecast night icon
    Night
    Mostly Clear
    51°
    Saturday 5/11
    Day
    69°
    Sunny
    Forecast day icon
    Night
    51°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny. Highs in the mid 60s. West winds 10 to 15 mph.
    Night Details
    Mostly clear. Lows in the lower 40s. Northwest winds 5 to 10 mph.
  • Forecast day icon
    Sunday
    60% Chance of Storms
    67°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Sunday 5/12
    Day
    67°
    60% Chance of Storms
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny in the morning then partly cloudy with showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 60s. North winds 10 to 15 mph. Chance of rain 60 percent.
    Night Details
    Partly cloudy with a slight chance of rain showers and thunderstorms in the evening then clear after midnight. Lows in the lower 40s. Northwest winds 5 to 10 mph. Chance of rain 20 percent.
  • Forecast day icon
    Monday
    30% Chance of Storms
    69°
    Forecast night icon
    Night
    40% Chance of Storms
    52°
    Monday 5/13
    Day
    69°
    30% Chance of Storms
    Forecast day icon
    Night
    52°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 30 percent.
    Night Details
    Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 40s. Chance of rain 40 percent.
  • Forecast day icon
    Tuesday
    80% Chance of Storms
    66°
    Forecast night icon
    Night
    60% Chance of Storms
    47°
    Tuesday 5/14
    Day
    66°
    80% Chance of Storms
    Forecast day icon
    Night
    47°
    60% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny with a chance of showers in the morning then partly cloudy with showers with a chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 80 percent.
    Night Details
    Partly cloudy with a chance of thunderstorms. Rain showers likely in the evening then a chance of rain showers after midnight. Lows in the lower 40s. Chance of rain 60 percent.
  • Forecast day icon
    Wednesday
    60% Chance of Storms
    57°
    Forecast night icon
    Night
    30% Chance of Storms
    44°
    Wednesday 5/15
    Day
    57°
    60% Chance of Storms
    Forecast day icon
    Night
    44°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. A chance of rain showers in the morning then rain showers likely with a slight chance of thunderstorms in the afternoon. Highs in the mid 50s. Chance of rain 60 percent.
    Night Details
    Partly cloudy with a chance of rain showers with a slight chance of thunderstorms in the evening then mostly clear after midnight. Lows in the upper 30s. Chance of rain 30 percent.
  • Forecast day icon
    Thursday
    30% Chance of Storms
    62°
    Forecast night icon
    Night
    Mostly Clear
    43°
    Thursday 5/16
    Day
    62°
    30% Chance of Storms
    Forecast day icon
    Night
    43°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A slight chance of rain showers in the morning then a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the lower 60s. Chance of rain 30 percent.
    Night Details
    Mostly clear. A slight chance of rain showers and thunderstorms in the evening. Lows in the lower 40s. Chance of rain 20 percent.
  • Forecast day icon
    Friday
    Mostly Sunny
    61°
    Forecast night icon
    Night
    Clear
    44°
    Friday 5/17
    Day
    61°
    Mostly Sunny
    Forecast day icon
    Night
    44°
    Clear
    Forecast night icon
    Day Details
    Mostly sunny. A slight chance of rain showers and thunderstorms in the afternoon. Breezy with highs in the mid 60s. Chance of rain 20 percent.
    Night Details
    Clear. Low temperature around 44F. Dew point will be around 34F with an average humidity of 57%. Winds will be 9 mph from the NW.
  • Forecast day icon
    Saturday
    Sunny
    62°
    Forecast night icon
    Night
    30% Chance of Rain
    44°
    Saturday 5/18
    Day
    62°
    Sunny
    Forecast day icon
    Night
    44°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny. High temperature around 62F. Dew point will be around 36F with an average humidity of 47%. Winds will be 10 mph from the N.
    Night Details
    Clear with a slight chance of rain. Chance of precipitation 30%. Low temperature around 44F. Dew point will be around 35F with an average humidity of 58%. Winds will be 6 mph from the W.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    65°
    Forecast night icon
    Night
    30% Chance of Rain
    47°
    Sunday 5/19
    Day
    65°
    30% Chance of Rain
    Forecast day icon
    Night
    47°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 30%. High temperature around 65F. Dew point will be around 38F with an average humidity of 48%. Winds will be 5 mph from the N.
    Night Details
    Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 47F. Dew point will be around 38F with an average humidity of 59%. Winds will be 3 mph from the W.