Keystone, South Dakota | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Thursday
    Thunderstorms
    66°
    Forecast night icon
    Night
    70% Chance of Storms
    46°
    Thursday 4/25
    Day
    66°
    Thunderstorms
    Forecast day icon
    Night
    46°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Showers and thunderstorms. Some thunderstorms may be severe. Highs in the mid 60s to lower 70s. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 90 percent.
    Night Details
    Mostly cloudy. Numerous showers and thunderstorms in the evening. Some thunderstorms may be severe. Lows in the lower 40s. Northwest winds 10 to 15 mph. Chance of rain 70 percent.
  • Forecast day icon
    Friday
    Thunderstorms
    54°
    Forecast night icon
    Night
    70% Chance of Storms
    43°
    Friday 4/26
    Day
    54°
    Thunderstorms
    Forecast day icon
    Night
    43°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Cloudy. Rain showers likely with a slight chance of thunderstorms in the morning then rain showers with a chance of thunderstorms in the afternoon. Breezy with highs in the mid 50s. North winds 15 to 20 mph increasing to 20 to 30 mph in the afternoon. Chance of rain 90 percent.
    Night Details
    Mostly cloudy. Rain showers likely with a chance of thunderstorms in the evening then a chance of rain showers after midnight. Lows in the upper 30s. North winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 70 percent.
  • Forecast day icon
    Saturday
    Snow Showers
    44°
    Forecast night icon
    Night
    80% Chance Snow Showers
    37°
    Saturday 4/27
    Day
    44°
    Snow Showers
    Forecast day icon
    Night
    37°
    80% Chance Snow Showers
    Forecast night icon
    Hourly
    Day Details
    Rain showers. A slight chance of snow showers in the afternoon. Highs in the mid 40s. Northeast winds 15 to 20 mph with gusts up to 30 mph. Chance of precipitation 90 percent.
    Night Details
    Snow showers likely. Rain showers. Little or no snow accumulation. Lows in the lower 30s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of precipitation 80 percent.
  • Forecast day icon
    Sunday
    70% Chance Frozen Mix
    45°
    Forecast night icon
    Night
    Partly Cloudy
    36°
    Sunday 4/28
    Day
    45°
    70% Chance Frozen Mix
    Forecast day icon
    Night
    36°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Rain showers and snow showers likely in the morning then a chance of rain showers with a slight chance of snow showers in the afternoon. Little or no snow accumulation. Highs in the mid 40s. Chance of precipitation 70 percent.
    Night Details
    Partly cloudy in the evening then clearing. Lows in the lower 30s.
  • Forecast day icon
    Monday
    40% Chance of Storms
    61°
    Forecast night icon
    Night
    30% Chance of Storms
    42°
    Monday 4/29
    Day
    61°
    40% Chance of Storms
    Forecast day icon
    Night
    42°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny in the morning then partly cloudy with a chance of rain showers with a slight chance of thunderstorms in the afternoon. Highs around 60. Chance of rain 40 percent.
    Night Details
    Partly cloudy with a chance of rain showers with a slight chance of thunderstorms in the evening then mostly clear with a slight chance of rain showers after midnight. Lows in the mid 30s. Chance of rain 30 percent.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    62°
    Forecast night icon
    Night
    Partly Cloudy
    43°
    Tuesday 4/30
    Day
    62°
    Mostly Sunny
    Forecast day icon
    Night
    43°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny with a 20 percent chance of rain showers. Highs in the upper 50s.
    Night Details
    Partly cloudy with a slight chance of rain showers in the evening then mostly clear after midnight. Lows in the upper 30s. Chance of rain 20 percent.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    65°
    Forecast night icon
    Night
    Mostly Clear
    46°
    Wednesday 5/1
    Day
    65°
    Mostly Sunny
    Forecast day icon
    Night
    46°
    Mostly Clear
    Forecast night icon
    Day Details
    Mostly sunny. A slight chance of rain showers in the afternoon. Highs in the lower 60s. Chance of rain 20 percent.
    Night Details
    Mostly clear with a 20 percent chance of showers. Lows in the lower 40s.
  • Forecast day icon
    Thursday
    30% Chance of Storms
    66°
    Forecast night icon
    Night
    40% Chance of Rain
    49°
    Thursday 5/2
    Day
    66°
    30% Chance of Storms
    Forecast day icon
    Night
    49°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 30 percent.
    Night Details
    Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 49F. Dew point will be around 39F with an average humidity of 55%. Winds will be 5 mph from the SW.
  • Forecast day icon
    Friday
    40% Chance of Rain
    70°
    Forecast night icon
    Night
    60% Chance of Rain
    48°
    Friday 5/3
    Day
    70°
    40% Chance of Rain
    Forecast day icon
    Night
    48°
    60% Chance of Rain
    Forecast night icon
    Day Details
    Mostly sunny with a chance of rain. Chance of precipitation 40%. High temperature around 70F. Dew point will be around 41F with an average humidity of 45%. Winds will be 7 mph from the S.
    Night Details
    Mostly clear with a chance of rain. Chance of precipitation 55%. Low temperature around 48F. Dew point will be around 37F with an average humidity of 50%. Winds will be 6 mph from the W.
  • Forecast day icon
    Saturday
    50% Chance of Rain
    64°
    Forecast night icon
    Night
    40% Chance of Rain
    45°
    Saturday 5/4
    Day
    64°
    50% Chance of Rain
    Forecast day icon
    Night
    45°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a chance of rain. Chance of precipitation 45%. High temperature around 64F. Dew point will be around 33F with an average humidity of 40%. Winds will be 6 mph from the SW.
    Night Details
    Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 45F. Dew point will be around 29F with an average humidity of 43%. Winds will be 5 mph from the W.