Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

Lat: 44.05°NLon: 103.05°WElev: 3202ft.

Fair

37°F

3°C

Humidity 57%
Wind Speed Calm
Barometer 30.11 in (1021.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 18 Apr 8:52 pm MDT
Extended Forecast for

Rapid City SD

  • Tonight

    Tonight: Mostly clear, with a low around 31. West wind 5 to 9 mph becoming calm  after midnight. Winds could gust as high as 17 mph.

    Low: 31 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 62. Light and variable wind becoming east 6 to 11 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 38. East wind 5 to 11 mph becoming southwest after midnight. Winds could gust as high as 23 mph.

    Low: 38 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 78. Southwest wind 6 to 10 mph becoming north in the morning. Winds could gust as high as 23 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46. North wind 5 to 9 mph becoming light and variable  in the evening. Winds could gust as high as 20 mph.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 26 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers after noon.  Partly sunny, with a high near 86. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 37 mph.

    High: 86 °F

    Partly Sunny
    then Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of showers, mainly before midnight.  Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 31. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 17 mph.
Sunday
Sunny, with a high near 62. Light and variable wind becoming east 6 to 11 mph in the afternoon. Winds could gust as high as 24 mph.
Sunday Night
Mostly clear, with a low around 38. East wind 5 to 11 mph becoming southwest after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 78. Southwest wind 6 to 10 mph becoming north in the morning. Winds could gust as high as 23 mph.
Monday Night
Mostly clear, with a low around 46. North wind 5 to 9 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 85. Light and variable wind becoming south 8 to 13 mph in the morning. Winds could gust as high as 26 mph.
Tuesday Night
Partly cloudy, with a low around 55. Southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers after noon. Partly sunny, with a high near 86. Breezy, with a southwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 37 mph.
Wednesday Night
A chance of showers, mainly before midnight. Mostly cloudy, with a low around 48.
Thursday
Showers likely, mainly after noon. Partly sunny, with a high near 58. Windy.
Thursday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 30. Windy.
Friday
A slight chance of rain and snow showers. Mostly sunny, with a high near 50. Breezy.
Friday Night
A slight chance of rain and snow showers. Partly cloudy, with a low around 29.
Saturday
A slight chance of rain and snow showers. Partly sunny, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Rapid City SD
 44.08°N 103.24°W (Elev. 3291 ft)
6:56 pm MDT Apr 18, 2026
8pm MDT Apr 18, 2026-6pm MDT Apr 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database