Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair and Breezy

64°F

18°C

Humidity 40%
Wind Speed N 21 mph
Barometer 30.21 in (1020.6 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 8 Sep 11:52 pm MDT
Extended Forecast for

Rapid Valley SD

  • Overnight

    Overnight: Mostly clear, with a low around 50. Northwest wind 7 to 13 mph, with gusts as high as 26 mph.

    Low: 50 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. North wind around 7 mph, with gusts as high as 21 mph.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47. North wind around 5 mph becoming calm. Winds could gust as high as 16 mph.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 25 mph.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58. West wind 5 to 8 mph, with gusts as high as 21 mph.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 84. Breezy, with a west wind 9 to 14 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 84 °F

    Sunny and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 48. Breezy.

    Low: 48 °F

    Partly Cloudy
    and Breezy
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight.  Mostly cloudy, with a low around 50.

    Low: 50 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 50. Northwest wind 7 to 13 mph, with gusts as high as 26 mph.
Wednesday
Sunny, with a high near 81. North wind around 7 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 47. North wind around 5 mph becoming calm. Winds could gust as high as 16 mph.
Thursday
Sunny, with a high near 92. Light and variable wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 25 mph.
Thursday Night
Mostly clear, with a low around 58. West wind 5 to 8 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 84. Breezy, with a west wind 9 to 14 mph becoming north 17 to 22 mph in the afternoon. Winds could gust as high as 34 mph.
Friday Night
Partly cloudy, with a low around 48. Breezy.
Saturday
Mostly sunny, with a high near 74.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 50.
Sunday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 75.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 48.
Monday
A slight chance of showers. Mostly sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 76.
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ABOUT THIS FORECAST

 
Point Forecast:
Rapid Valley SD
 44.06°N 103.15°W (Elev. 3107 ft)
10:16 pm MDT Sep 8, 2026
12am MDT Sep 9, 2026-6pm MDT Sep 15, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database