10-Day Weather Forecast - Spearfish, SD

Mostly sunny. Highs around 90. West winds 10 to 15 mph.

Mostly clear. Lows in the mid 60s. South winds 10 to 15 mph.

Mostly sunny. Highs in the mid 90s. South winds 10 to 15 mph with gusts up to 25 mph.

Mostly clear. Lows in the upper 60s. South winds 10 to 20 mph with gusts up to 30 mph.

Mostly sunny. A slight chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 20 percent.

Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 60s.

Partly cloudy. A chance of showers with a slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 50 percent.

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 mid 60s. Chance of rain 50 percent.

Becoming partly cloudy. A chance of showers. A slight chance of thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 30 percent.

Partly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the upper 50s. Chance of rain 30 percent.

Partly cloudy in the morning, then becoming mostly sunny. Highs in the upper 70s.

Mostly clear. Lows in the lower 50s.

Mostly sunny. Highs around 80.

Clear. Low temperature around 55F. Dew point will be around 45F with an average humidity of 54%. Winds will be 4 mph from the SW.

Sunny. High temperature around 73F. Dew point will be around 45F with an average humidity of 45%. Winds will be 9 mph from the NW.

Clear. Low temperature around 53F. Dew point will be around 41F with an average humidity of 52%. Winds will be 5 mph from the SW.

Sunny. High temperature around 73F. Dew point will be around 43F with an average humidity of 43%. Winds will be 7 mph from the NW.

Mostly clear. Low temperature around 51F. Dew point will be around 41F with an average humidity of 54%. Winds will be 2 mph from the NW.