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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Rapid City, Rapid City Regional Airport (KRAP)

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

Fair

42°F

6°C

Humidity 79%
Wind Speed SE 6 mph
Barometer 30.32 in (1027.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 4 Oct 6:52 am MDT
Extended Forecast for

New Underwood SD

  • Today

    Today: Partly sunny through mid morning, then becoming sunny, with a high near 78. Southeast wind 6 to 15 mph, with gusts as high as 26 mph.

    High: 78 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Clear, with a low around 49. East wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph.

    Low: 49 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 89. Calm wind becoming northeast around 5 mph. Winds could gust as high as 15 mph.

    High: 89 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 55. Light and variable wind becoming west 5 to 7 mph in the evening. Winds could gust as high as 15 mph.

    Low: 55 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81. Northwest wind 5 to 13 mph becoming north in the afternoon. Winds could gust as high as 26 mph.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. North wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

Detailed Forecast

Today
Partly sunny through mid morning, then becoming sunny, with a high near 78. Southeast wind 6 to 15 mph, with gusts as high as 26 mph.
Tonight
Clear, with a low around 49. East wind 5 to 11 mph becoming south after midnight. Winds could gust as high as 22 mph.
Monday
Sunny, with a high near 89. Calm wind becoming northeast around 5 mph. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 55. Light and variable wind becoming west 5 to 7 mph in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 81. Northwest wind 5 to 13 mph becoming north in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 51. North wind 5 to 8 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 55.
Saturday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
New Underwood SD
 44.09°N 102.85°W (Elev. 2887 ft)
Last Update:
5:16 am MDT Oct 4, 2026
Forecast Valid:
7am MDT Oct 4, 2026-6pm MDT Oct 10, 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