Keystone, South Dakota | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Saturday
    Mostly Cloudy
    46°
    Forecast night icon
    Night
    70% Chance Frozen Mix
    37°
    Saturday 4/27
    Day
    46°
    Mostly Cloudy
    Forecast day icon
    Night
    37°
    70% Chance Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a 20 percent chance of rain showers. Highs in the upper 40s. Northeast winds 15 to 20 mph with gusts up to 35 mph.
    Night Details
    Cloudy. A chance of rain showers and snow showers in the evening then rain showers and snow showers likely after midnight. Patchy fog after midnight. Snow accumulation up to 1 inch. Lows in the lower 30s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of precipitation 70 percent.
  • Forecast day icon
    Sunday
    70% Chance Frozen Mix
    43°
    Forecast night icon
    Night
    Partly Cloudy
    37°
    Sunday 4/28
    Day
    43°
    70% Chance Frozen Mix
    Forecast day icon
    Night
    37°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Patchy fog in the morning. 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. Snow accumulation up to 1 inch possible. Highs in the mid 40s. Northeast winds 5 to 10 mph. Chance of precipitation 70 percent.
    Night Details
    Partly cloudy in the evening then clearing. Lows in the lower 30s. Northeast winds 5 to 10 mph becoming west after midnight.
  • Forecast day icon
    Monday
    40% Chance Rain Showers
    61°
    Forecast night icon
    Night
    50% Chance Rain Showers
    45°
    Monday 4/29
    Day
    61°
    40% Chance Rain Showers
    Forecast day icon
    Night
    45°
    50% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny in the morning then partly cloudy with a chance of rain showers in the afternoon. Highs around 60. West winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 40 percent.
    Night Details
    Partly cloudy with a 50 percent chance of rain showers. Breezy with lows in the upper 30s.
  • Forecast day icon
    Tuesday
    30% Chance Frozen Mix
    54°
    Forecast night icon
    Night
    40% Chance Frozen Mix
    36°
    Tuesday 4/30
    Day
    54°
    30% Chance Frozen Mix
    Forecast day icon
    Night
    36°
    40% Chance Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny with a chance of rain showers and snow showers. Breezy with highs in the mid 50s. Chance of precipitation 30 percent.
    Night Details
    Partly cloudy with a chance of rain showers and snow showers. Breezy with lows in the lower 30s. Chance of precipitation 40 percent.
  • Forecast day icon
    Wednesday
    50% Chance Frozen Mix
    53°
    Forecast night icon
    Night
    40% Chance Frozen Mix
    39°
    Wednesday 5/1
    Day
    53°
    50% Chance Frozen Mix
    Forecast day icon
    Night
    39°
    40% Chance Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a chance of rain showers and snow showers. Highs in the upper 40s. Chance of precipitation 50 percent.
    Night Details
    Partly cloudy with a chance of rain showers and snow showers. Lows in the lower 30s. Chance of precipitation 40 percent.
  • Forecast day icon
    Thursday
    50% Chance Frozen Mix
    49°
    Forecast night icon
    Night
    Partly Cloudy
    36°
    Thursday 5/2
    Day
    49°
    50% Chance Frozen Mix
    Forecast day icon
    Night
    36°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with a chance of snow showers and rain showers. Highs in the upper 40s. Chance of precipitation 50 percent.
    Night Details
    Partly cloudy with a slight chance of rain showers and snow showers. Lows in the lower 30s. Chance of precipitation 20 percent.
  • Forecast day icon
    Friday
    30% Chance Frozen Mix
    51°
    Forecast night icon
    Night
    40% Chance of Rain
    38°
    Friday 5/3
    Day
    51°
    30% Chance Frozen Mix
    Forecast day icon
    Night
    38°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. A slight chance of rain showers and snow showers in the morning then a chance of rain showers in the afternoon. Highs in the lower 50s. Chance of precipitation 30 percent.
    Night Details
    Mostly cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 38F. Dew point will be around 28F with an average humidity of 61%. Winds will be 7 mph from the NW.
  • Forecast day icon
    Saturday
    40% Chance of Rain
    51°
    Forecast night icon
    Night
    40% Chance of Rain
    37°
    Saturday 5/4
    Day
    51°
    40% Chance of Rain
    Forecast day icon
    Night
    37°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a chance of rain. Chance of precipitation 40%. High temperature around 51F. Dew point will be around 31F with an average humidity of 55%. Winds will be 5 mph from the N.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 37F. Dew point will be around 28F with an average humidity of 59%. Winds will be 4 mph from the W.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    54°
    Forecast night icon
    Night
    40% Chance of Rain
    42°
    Sunday 5/5
    Day
    54°
    30% Chance of Rain
    Forecast day icon
    Night
    42°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 54F. Dew point will be around 34F with an average humidity of 57%. Winds will be 3 mph from the E.
    Night Details
    Partly cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 42F. Dew point will be around 33F with an average humidity of 60%. Winds will be 4 mph from the W.
  • Forecast day icon
    Monday
    30% Chance of Rain
    59°
    Forecast night icon
    Night
    Clear
    43°
    Monday 5/6
    Day
    59°
    30% Chance of Rain
    Forecast day icon
    Night
    43°
    Clear
    Forecast night icon
    Day Details
    Mostly sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 59F. Dew point will be around 35F with an average humidity of 51%. Winds will be 4 mph from the NW.
    Night Details
    Clear. Low temperature around 43F. Dew point will be around 33F with an average humidity of 55%. Winds will be 4 mph from the W.