10-Day Weather Forecast - Keystone, SD

Becoming partly cloudy. Breezy with highs in the upper 50s. West winds 15 to 25 mph with gusts up to 45 mph.

Mostly clear. Lows in the upper 30s. West winds 10 to 15 mph with gusts up to 30 mph.

Mostly sunny in the morning then becoming partly cloudy. Highs in the lower 50s. West winds 10 to 15 mph with gusts up to 35 mph.

Partly cloudy in the evening then becoming mostly clear. Lows in the lower 30s. West winds 10 to 15 mph with gusts up to 30 mph.

Mostly sunny. Highs in the mid 40s. West winds 5 to 10 mph with gusts up to 25 mph.

Partly cloudy with a 50 percent chance of snow. Much cooler with lows 5 to 10 above.

Mostly sunny. Much cooler with highs around 20.

Clear. Lows 5 to 10 above.

Sunny. Highs in the mid 30s.

Partly cloudy. Lows in the lower 20s.

Partly cloudy. Highs in the mid 40s.

Partly cloudy. A slight chance of snow after midnight. Lows in the mid 20s. Chance of snow 20 percent.

Partly cloudy. Highs in the lower 40s.

Mostly clear. Low temperature around 38F. Dew point will be around 22F with an average humidity of 47%. Winds will be 4 mph from the W.

Partly cloudy. High temperature around 53F. Dew point will be around 20F with an average humidity of 36%. Winds will be 2 mph from the E.

Partly cloudy. Low temperature around 37F. Dew point will be around 22F with an average humidity of 51%. Winds will be 3 mph from the SW.

Cloudy. High temperature around 49F. Dew point will be around 22F with an average humidity of 44%. Winds will be 4 mph from the NW.

Mostly clear with a slight chance of rain-snow mix. Chance of precipitation 25%. Low temperature around 29F. Dew point will be around 22F with an average humidity of 64%. Winds will be 4 mph from the NW.

Sunny. High temperature around 42F. Dew point will be around 19F with an average humidity of 49%. Winds will be 4 mph from the NW.

Clear. Low temperature around 28F. Dew point will be around 18F with an average humidity of 63%. Winds will be 4 mph from the W.