Keystone, South Dakota | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Sunday
    50% Chance of Storms
    68°
    Forecast night icon
    Night
    30% Chance of Storms
    48°
    Sunday 5/12
    Day
    68°
    50% Chance of Storms
    Forecast day icon
    Night
    48°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny this morning then partly cloudy with scattered rain showers and thunderstorms this afternoon. Highs in the upper 60s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.
    Night Details
    Partly cloudy with a chance of rain showers with a slight chance of thunderstorms in the evening then clear after midnight. Lows in the lower 40s. Northwest winds 5 to 10 mph. Chance of rain 30 percent.
  • Forecast day icon
    Monday
    Partly Cloudy
    69°
    Forecast night icon
    Night
    50% Chance of Storms
    53°
    Monday 5/13
    Day
    69°
    Partly Cloudy
    Forecast day icon
    Night
    53°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Sunny in the morning then partly cloudy with a slight chance of rain showers and thunderstorms in the afternoon. Highs in the upper 60s. South winds 10 to 15 mph. Chance of rain 20 percent.
    Night Details
    Partly cloudy with a chance of showers. A chance of thunderstorms in the evening then a slight chance of thunderstorms after midnight. Lows in the upper 40s. South winds 10 to 15 mph. Chance of rain 50 percent.
  • Forecast day icon
    Tuesday
    60% Chance of Storms
    66°
    Forecast night icon
    Night
    50% Chance of Storms
    49°
    Tuesday 5/14
    Day
    66°
    60% Chance of Storms
    Forecast day icon
    Night
    49°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a chance of showers in the morning then cloudy with showers likely with a chance of thunderstorms in the afternoon. Highs in the mid 60s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 60 percent.
    Night Details
    Becoming partly cloudy. A chance of rain showers. A chance of thunderstorms in the evening then a slight chance of thunderstorms after midnight. Lows in the lower 40s. Chance of rain 50 percent.
  • Forecast day icon
    Wednesday
    50% Chance of Storms
    59°
    Forecast night icon
    Night
    Partly Cloudy
    46°
    Wednesday 5/15
    Day
    59°
    50% Chance of Storms
    Forecast day icon
    Night
    46°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a chance of rain showers. A chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of rain 50 percent.
    Night Details
    Partly cloudy with a slight chance of rain showers and thunderstorms in the evening then mostly clear after midnight. Lows in the upper 30s. Chance of rain 20 percent.
  • Forecast day icon
    Thursday
    30% Chance of Storms
    65°
    Forecast night icon
    Night
    Partly Cloudy
    50°
    Thursday 5/16
    Day
    65°
    30% Chance of Storms
    Forecast day icon
    Night
    50°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent.
    Night Details
    Partly cloudy in the evening then becoming mostly clear. A slight chance of thunderstorms in the evening. A slight chance of showers. Lows in the mid 40s. Chance of rain 20 percent.
  • Forecast day icon
    Friday
    30% Chance of Storms
    67°
    Forecast night icon
    Night
    30% Chance of Storms
    46°
    Friday 5/17
    Day
    67°
    30% Chance of Storms
    Forecast day icon
    Night
    46°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. A slight chance of showers in the morning then a chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent.
    Night Details
    Mostly clear. A chance of rain showers with a slight chance of thunderstorms in the evening then a slight chance of rain showers after midnight. Lows in the lower 40s. Chance of rain 30 percent.
  • Forecast day icon
    Saturday
    30% Chance of Storms
    66°
    Forecast night icon
    Night
    30% Chance of Rain
    43°
    Saturday 5/18
    Day
    66°
    30% Chance of Storms
    Forecast day icon
    Night
    43°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny. A chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs in the mid 60s. Chance of rain 30 percent.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 43F. Dew point will be around 38F with an average humidity of 60%. Winds will be 9 mph from the N.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    61°
    Forecast night icon
    Night
    30% Chance of Rain
    45°
    Sunday 5/19
    Day
    61°
    30% Chance of Rain
    Forecast day icon
    Night
    45°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 61F. Dew point will be around 35F with an average humidity of 46%. Winds will be 6 mph from the NW.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 45F. Dew point will be around 33F with an average humidity of 52%. Winds will be 5 mph from the W.
  • Forecast day icon
    Monday
    30% Chance of Rain
    65°
    Forecast night icon
    Night
    30% Chance of Rain
    47°
    Monday 5/20
    Day
    65°
    30% Chance of Rain
    Forecast day icon
    Night
    47°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny with a slight chance of rain. Chance of precipitation 30%. High temperature around 65F. Dew point will be around 37F with an average humidity of 45%. Winds will be 4 mph from the W.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 47F. Dew point will be around 36F with an average humidity of 54%. Winds will be 6 mph from the NW.
  • Forecast day icon
    Tuesday
    40% Chance of Rain
    64°
    Forecast night icon
    Night
    40% Chance of Rain
    47°
    Tuesday 5/21
    Day
    64°
    40% Chance of Rain
    Forecast day icon
    Night
    47°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 64F. Dew point will be around 38F with an average humidity of 49%. Winds will be 4 mph from the W.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 47F. Dew point will be around 38F with an average humidity of 57%. Winds will be 5 mph from the W.