National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy to Excessive Rains in The Four Corners Region and Midwest; Heat Persists in the South-Central U.S.

Repeated rounds of showers and thunderstorms could bring a flash flooding threat across the Four Corners region and from the mid-Mississippi Valley into the lower Great Lakes. Hot temperatures and high humidity will continue to challenge daily records from the Southern Plains to the lower Mississippi Valley. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair and Breezy

73°F

23°C

Humidity 48%
Wind Speed S 22 G 32 mph
Barometer 30.12 in (1018.6 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 16 Sep 12:52 pm MDT
Extended Forecast for

Rapid City SD

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 82. Southeast wind 7 to 11 mph becoming north. Winds could gust as high as 28 mph.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 56. Northwest wind 3 to 7 mph. Winds could gust as high as 18 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Calm wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 22 mph.

    High: 75 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.

    Low: 58 °F

    Showers
    Likely

  • Friday

    Friday: Partly sunny, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning. Winds could gust as high as 20 mph.

    High: 78 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers before 9pm, then a slight chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Northeast wind around 6 mph becoming calm in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 60%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 71. Chance of precipitation is 70%.

    High: 71 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Showers

  • Sunday

    Sunday: Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 82. Southeast wind 7 to 11 mph becoming north. Winds could gust as high as 28 mph.
Tonight
Increasing clouds, with a low around 56. Northwest wind 3 to 7 mph. Winds could gust as high as 18 mph.
Thursday
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 75. Calm wind becoming southeast 5 to 9 mph in the morning. Winds could gust as high as 22 mph.
Thursday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. East wind 5 to 7 mph becoming calm after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A slight chance of showers before 9pm, then a slight chance of showers and thunderstorms between 9pm and midnight, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 55. Northeast wind around 6 mph becoming calm in the evening. Winds could gust as high as 17 mph. Chance of precipitation is 60%.
Saturday
Showers likely, with thunderstorms also possible after noon. Cloudy, with a high near 71. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Mostly cloudy, with a low around 55.
Sunday
Showers, with thunderstorms also possible after noon. Mostly cloudy, with a high near 67.
Sunday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 53.
Monday
A chance of showers. Partly sunny, with a high near 70.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rapid City SD
 44.08°N 103.24°W (Elev. 3291 ft)
Last Update:
1:11 pm MDT Sep 16, 2026
Forecast Valid:
1pm MDT Sep 16, 2026-6pm MDT Sep 22, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation