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

Lowell to Impact Hawaii; Heat Persists in the South-Central U.S.

Hurricane Lowell is forecast to pass west of Kauai`s coastal waters tonight. Impacts such as high surf and heavy rain could impact all of the islands. Sweltering heat remains across the South-Central Plains and Lower/Middle Mississippi Valley into this week with limited nighttime relief. Periods of moderate to heavy rainfall will be possible through Tuesday morning in the northern Rockies. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

Lat: 43.73°NLon: 103.62°WElev: 5600ft.

Fair

71°F

22°C

Humidity 44%
Wind Speed SW 15 G 30 mph
Barometer 29.99 in (1008.0 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 7 Sep 10:53 am MDT
Extended Forecast for

Mount Rushmore SD

  • Labor Day

    Labor Day: Mostly sunny, with a high near 85. West wind 8 to 13 mph, with gusts as high as 28 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. West wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 25 mph.

    Low: 57 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Calm wind becoming southwest around 5 mph. Winds could gust as high as 15 mph.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 53. Calm wind becoming north around 5 mph. Winds could gust as high as 15 mph.

    Low: 53 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 75. Light and variable wind.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 55. Light and variable wind.

    Low: 55 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Labor Day
Mostly sunny, with a high near 85. West wind 8 to 13 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 57. West wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 25 mph.
Tuesday
Sunny, with a high near 78. Calm wind becoming southwest around 5 mph. Winds could gust as high as 15 mph.
Tuesday Night
Mostly clear, with a low around 53. Calm wind becoming north around 5 mph. Winds could gust as high as 15 mph.
Wednesday
Sunny, with a high near 75. Light and variable wind.
Wednesday Night
Clear, with a low around 55. Light and variable wind.
Thursday
Sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 59.
Friday
Sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 71.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 50.
Sunday
A chance of showers. Partly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
Last Update:
9:36 am MDT Sep 7, 2026
Forecast Valid:
11am MDT Sep 7, 2026-6pm MDT Sep 13, 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