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

Tonight: Partly cloudy, with a low around 52. Northwest wind 5 to 7 mph, with gusts as high as 16 mph.
Partly Cloudy

 Juneteenth

Juneteenth: Mostly sunny, with a high near 77. North wind 8 to 15 mph, with gusts as high as 29 mph.
Mostly Sunny

 Friday
Night
Friday Night: A 20 percent chance of showers after midnight. Partly cloudy, with a low around 50. North wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Partly Cloudy
then Slight
Chance
Showers
 Saturday

Saturday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 76. Light south wind becoming southeast 12 to 17 mph in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Slight Chance
Showers then
Chance
T-storms
 Saturday
Night
Saturday Night: Showers and possibly a thunderstorm. Low around 52. East wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Showers

 Sunday

Sunday: Showers and possibly a thunderstorm. High near 66. East wind 5 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Showers

 Sunday
Night
Sunday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Chance
T-storms then
Slight Chance
Showers
 Monday

Monday: A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 70.
Showers
Likely

 Monday
Night
Monday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49.
Chance
T-storms then
Slight Chance
Showers
Lo 52 °F Hi 77 °F Lo 50 °F Hi 76 °F Lo 52 °F Hi 66 °F Lo 49 °F Hi 70 °F Lo 49 °F

 

Tonight
 
 Partly cloudy, with a low around 52. Northwest wind 5 to 7 mph, with gusts as high as 16 mph.
Juneteenth
 
 Mostly sunny, with a high near 77. North wind 8 to 15 mph, with gusts as high as 29 mph.
Friday Night
 
 A 20 percent chance of showers after midnight. Partly cloudy, with a low around 50. North wind 5 to 9 mph becoming light and variable after midnight. Winds could gust as high as 21 mph.
Saturday
 
 A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 76. Light south wind becoming southeast 12 to 17 mph in the morning. Winds could gust as high as 31 mph. Chance of precipitation is 50%.
Saturday Night
 
 Showers and possibly a thunderstorm. Low around 52. East wind 5 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.
Sunday
 
 Showers and possibly a thunderstorm. High near 66. East wind 5 to 13 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Sunday Night
 
 A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Monday
 
 A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 70.
Monday Night
 
 A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49.
Tuesday
 
 A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73.
Tuesday Night
 
 Mostly clear, with a low around 49.
Wednesday
 
 A slight chance of showers and thunderstorms. Sunny, with a high near 75.
Wednesday Night
 
 A chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Thursday
 
 A chance of showers and thunderstorms. Mostly sunny, with a high near 79.

 

Forecast from NOAA-NWS for Rapid Valley SD.