National Weather Service Forecast for: Spearfish SD
Issued by: National Weather Service Rapid City, SD
Updated: 2:49 pm MDT Mar 19, 2026
 
Tonight

Tonight: Mostly clear, with a low around 53. West wind 6 to 10 mph, with gusts as high as 21 mph.
Mostly Clear

 Friday

Friday: Sunny, with a high near 80. West wind 7 to 14 mph, with gusts as high as 23 mph.
Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 57. West wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 16 mph.
Mostly Clear

 Saturday

Saturday: Mostly sunny, with a high near 86. Southwest wind 7 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Mostly Sunny

 Saturday
Night
Saturday Night: A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 44. Northwest wind 11 to 17 mph, with gusts as high as 24 mph.
Mostly Cloudy
then Chance
Showers
 Sunday

Sunday: A 20 percent chance of showers before noon. Mostly sunny, with a high near 56. Northwest wind 10 to 15 mph, with gusts as high as 21 mph.
Slight Chance
Showers then
Mostly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 37. Northwest wind 5 to 9 mph becoming southeast after midnight. Winds could gust as high as 16 mph.
Partly Cloudy

 Monday

Monday: Partly sunny, with a high near 62. Light and variable wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph.
Partly Sunny

 Monday
Night
Monday Night: Mostly cloudy, with a low around 40.
Mostly Cloudy
Lo 53 °F Hi 80 °F Lo 57 °F Hi 86 °F Lo 44 °F Hi 56 °F Lo 37 °F Hi 62 °F Lo 40 °F

Hazardous Weather Outlook
Red Flag Warning
 

Tonight
 
 Mostly clear, with a low around 53. West wind 6 to 10 mph, with gusts as high as 21 mph.
Friday
 
 Sunny, with a high near 80. West wind 7 to 14 mph, with gusts as high as 23 mph.
Friday Night
 
 Mostly clear, with a low around 57. West wind 6 to 10 mph becoming southwest after midnight. Winds could gust as high as 16 mph.
Saturday
 
 Mostly sunny, with a high near 86. Southwest wind 7 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
 
 A 40 percent chance of showers after midnight. Mostly cloudy, with a low around 44. Northwest wind 11 to 17 mph, with gusts as high as 24 mph.
Sunday
 
 A 20 percent chance of showers before noon. Mostly sunny, with a high near 56. Northwest wind 10 to 15 mph, with gusts as high as 21 mph.
Sunday Night
 
 Partly cloudy, with a low around 37. Northwest wind 5 to 9 mph becoming southeast after midnight. Winds could gust as high as 16 mph.
Monday
 
 Partly sunny, with a high near 62. Light and variable wind becoming north 5 to 7 mph in the afternoon. Winds could gust as high as 15 mph.
Monday Night
 
 Mostly cloudy, with a low around 40.
Tuesday
 
 Mostly cloudy, with a high near 65.
Tuesday Night
 
 Mostly cloudy, with a low around 50.
Wednesday
 
 Partly sunny, with a high near 74.
Wednesday Night
 
 A chance of rain and snow. Mostly cloudy, with a low around 35.
Thursday
 
 A chance of snow. Mostly sunny, with a high near 47. Breezy.

 

Forecast from NOAA-NWS for Spearfish SD.