National Weather Service Forecast for: Spearfish SD
Issued by: National Weather Service Rapid City, SD
Updated: 9:09 pm MDT Jun 18, 2026
 
Tonight

Tonight: A slight chance of showers and thunderstorms between 10pm and midnight, then a slight chance of showers after midnight.  Mostly cloudy, with a low around 52. Light west wind.  Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
Juneteenth

Juneteenth: Increasing clouds, with a high near 72. Light and variable wind becoming northwest 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Increasing
Clouds

Friday
Night
Friday Night: A 20 percent chance of showers after midnight.  Cloudy during the early evening, then gradual clearing, with a low around 53. North wind 5 to 9 mph becoming southeast after midnight. Winds could gust as high as 18 mph.
Mostly Cloudy
then Slight
Chance
Showers
Saturday

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 78. Southeast wind 10 to 16 mph, with gusts as high as 26 mph.  Chance of precipitation is 40%.
Slight Chance
Showers then
Chance
T-storms
Saturday
Night
Saturday Night: Showers and possibly a thunderstorm.  Low around 54. Southeast wind 11 to 16 mph becoming light  after midnight. Winds could gust as high as 26 mph.  Chance of precipitation is 80%.
Showers

Sunday

Sunday: Showers and possibly a thunderstorm.  High near 66. Northeast wind 3 to 8 mph. Winds could gust as high as 18 mph.  Chance of precipitation is 90%.
Showers

Sunday
Night
Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Chance
T-storms then
Chance
Showers
Monday

Monday: A chance of showers, then showers and possibly a thunderstorm after noon.  Partly sunny, with a high near 68.
Showers

Monday
Night
Monday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Partly cloudy, with a low around 49.
Chance
T-storms then
Slight Chance
Showers
Lo 52 °F Hi 72 °F Lo 53 °F Hi 78 °F Lo 54 °F Hi 66 °F Lo 50 °F Hi 68 °F Lo 49 °F

 

Tonight
 
A slight chance of showers and thunderstorms between 10pm and midnight, then a slight chance of showers after midnight. Mostly cloudy, with a low around 52. Light west wind. Chance of precipitation is 20%.
Juneteenth
 
Increasing clouds, with a high near 72. Light and variable wind becoming northwest 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
 
A 20 percent chance of showers after midnight. Cloudy during the early evening, then gradual clearing, with a low around 53. North wind 5 to 9 mph becoming southeast after midnight. Winds could gust as high as 18 mph.
Saturday
 
A slight chance of showers, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Southeast wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Saturday Night
 
Showers and possibly a thunderstorm. Low around 54. Southeast wind 11 to 16 mph becoming light after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday
 
Showers and possibly a thunderstorm. High near 66. Northeast wind 3 to 8 mph. Winds could gust as high as 18 mph. Chance of precipitation is 90%.
Sunday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 50. Chance of precipitation is 50%.
Monday
 
A chance of showers, then showers and possibly a thunderstorm after noon. Partly sunny, with a high near 68.
Monday Night
 
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Partly cloudy, with a low around 49.
Tuesday
 
A slight chance of showers, with thunderstorms also possible after noon. Sunny, with a high near 70.
Tuesday Night
 
Mostly clear, with a low around 50.
Wednesday
 
A chance of showers and thunderstorms. Sunny, with a high near 73.
Wednesday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 53.
Thursday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 77.

 

Forecast from NOAA-NWS for Spearfish SD.