10-Day Weather Forecast - Keystone, SD

Widespread frost in the morning. Mostly sunny. Highs in the lower 50s. West winds 5 to 10 mph with gusts up to 20 mph.

Clear. Lows in the lower 30s. South winds 5 to 10 mph.

Partly cloudy. 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 upper 50s. South winds 5 to 10 mph with gusts up to 30 mph. Chance of rain 40 percent.

Partly cloudy in the evening then clearing. Lows in the upper 30s. South winds 5 to 10 mph. Gusts up to 20 mph in the evening.

Partly cloudy. Rain showers likely with a chance of thunderstorms in the afternoon. Highs around 60. Southeast winds 5 to 10 mph with gusts up to 25 mph. Chance of rain 70 percent.

Becoming partly cloudy. A chance of thunderstorms in the evening. Rain showers likely. Lows in the upper 30s. Chance of rain 70 percent.

Becoming mostly cloudy. A chance of rain showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 50s. Chance of rain 50 percent.

Partly cloudy. Lows in the upper 30s.

Mostly sunny. A slight chance of rain showers and thunderstorms in the afternoon. Highs in the upper 60s. Chance of rain 20 percent.

Mostly clear. Lows in the mid 40s.

Sunny. Highs in the mid 70s.

Mostly clear. Lows in the upper 40s.

Mostly sunny. Highs in the lower 80s.

Mostly clear. Low temperature around 52F. Dew point will be around 39F with an average humidity of 44%. Winds will be 7 mph from the SW.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 72F. Dew point will be around 37F with an average humidity of 35%. Winds will be 3 mph from the SE.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 49F. Dew point will be around 38F with an average humidity of 54%. Winds will be 2 mph from the W.

Mostly sunny. High temperature around 73F. Dew point will be around 38F with an average humidity of 37%. Winds will be 3 mph from the W.

Partly cloudy. Low temperature around 51F. Dew point will be around 38F with an average humidity of 49%. Winds will be 3 mph from the W.

Sunny. High temperature around 78F. Dew point will be around 39F with an average humidity of 33%. Winds will be 4 mph from the S.

Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 55F. Dew point will be around 40F with an average humidity of 47%. Winds will be 4 mph from the W.