National Weather Service Forecast for: Rapid Valley SD
Issued by: National Weather Service Rapid City, SD
Updated: 10:48 am MDT Mar 19, 2026
 
Today

Today: Mostly sunny, with a high near 84. Northwest wind 8 to 11 mph, with gusts as high as 25 mph.
Mostly Sunny


 Tonight

Tonight: Partly cloudy, with a low around 47. West wind around 7 mph, with gusts as high as 16 mph.
Partly Cloudy


 Friday

Friday: Sunny, with a high near 84. Northwest wind 6 to 11 mph, with gusts as high as 23 mph.
Sunny


 Friday
Night
Friday Night: Mostly clear, with a low around 49. Northwest wind 5 to 8 mph becoming southwest after midnight. Winds could gust as high as 17 mph.
Mostly Clear


 Saturday

Saturday: Sunny, with a high near 91. Breezy, with a southwest wind 6 to 11 mph becoming northwest 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.
Sunny then
Sunny and
Breezy

 Saturday
Night
Saturday Night: A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. Breezy, with a north wind 18 to 24 mph, with gusts as high as 33 mph.
Breezy.
Partly Cloudy
then Slight
Chance
Showers
 Sunday

Sunday: Mostly sunny, with a high near 60. Breezy, with a north wind 14 to 20 mph, with gusts as high as 25 mph.
Partly Sunny
and Breezy
then Mostly
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 32. North wind 6 to 13 mph becoming south after midnight. Winds could gust as high as 22 mph.
Partly Cloudy


 Monday

Monday: Partly sunny, with a high near 66.
Partly Sunny
Hi 84 °F Lo 47 °F Hi 84 °F Lo 49 °F Hi 91 °F Lo 41 °F Hi 60 °F Lo 32 °F Hi 66 °F

Hazardous Weather Outlook
Red Flag Warning
 

Today
 
 Mostly sunny, with a high near 84. Northwest wind 8 to 11 mph, with gusts as high as 25 mph.
Tonight
 
 Partly cloudy, with a low around 47. West wind around 7 mph, with gusts as high as 16 mph.
Friday
 
 Sunny, with a high near 84. Northwest wind 6 to 11 mph, with gusts as high as 23 mph.
Friday Night
 
 Mostly clear, with a low around 49. Northwest wind 5 to 8 mph becoming southwest after midnight. Winds could gust as high as 17 mph.
Saturday
 
 Sunny, with a high near 91. Breezy, with a southwest wind 6 to 11 mph becoming northwest 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.
Saturday Night
 
 A 20 percent chance of showers after midnight. Mostly cloudy, with a low around 41. Breezy, with a north wind 18 to 24 mph, with gusts as high as 33 mph.
Sunday
 
 Mostly sunny, with a high near 60. Breezy, with a north wind 14 to 20 mph, with gusts as high as 25 mph.
Sunday Night
 
 Partly cloudy, with a low around 32. North wind 6 to 13 mph becoming south after midnight. Winds could gust as high as 22 mph.
Monday
 
 Partly sunny, with a high near 66.
Monday Night
 
 Mostly cloudy, with a low around 36.
Tuesday
 
 Partly sunny, with a high near 64.
Tuesday Night
 
 Mostly cloudy, with a low around 40.
Wednesday
 
 Mostly sunny, with a high near 77.

 

Forecast from NOAA-NWS for Rapid Valley SD.