Thunderstorms and Heavy Rainfall in the Southeast, Montana, and Iowa; Lowell Begins to Impact Hawaii

Strong thunderstorms with damaging winds and heavy rain are expected across portions of the Southeast. Thunderstorms may produce large hail across portions of Montana. Heavy rainfall could produce flash flooding across Iowa and vulnerable areas in Utah. Lowell will bring heavy rain, dangerous swells and rip currents to portions of Hawaii. Sweltering heat persists across the South-Central US. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

84°F

29°C

Humidity 32%
Wind Speed SE 13 G 22 mph
Barometer 30.08 in (1010.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 6 Sep 2:53 pm MDT
Extended Forecast for

5 Miles NNW Custer SD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 86. South wind 5 to 7 mph, with gusts as high as 21 mph.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms.  Partly cloudy, with a low around 59. Southeast wind around 7 mph becoming southwest after midnight. Winds could gust as high as 20 mph.

    Low: 59 °F

    Slight Chance
    T-storms

  • Labor Day

    Labor Day: A 20 percent chance of showers and thunderstorms before noon.  Mostly cloudy, then gradually becoming sunny, with a high near 80. West wind 7 to 15 mph, with gusts as high as 29 mph.

    High: 80 °F

    Slight Chance
    T-storms then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. West wind 5 to 13 mph becoming north after midnight. Winds could gust as high as 28 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 25 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. Northwest wind 5 to 8 mph becoming north in the evening. Winds could gust as high as 22 mph.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 86. South wind 5 to 7 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 59. Southeast wind around 7 mph becoming southwest after midnight. Winds could gust as high as 20 mph.
Labor Day
A 20 percent chance of showers and thunderstorms before noon. Mostly cloudy, then gradually becoming sunny, with a high near 80. West wind 7 to 15 mph, with gusts as high as 29 mph.
Monday Night
Mostly clear, with a low around 51. West wind 5 to 13 mph becoming north after midnight. Winds could gust as high as 28 mph.
Tuesday
Sunny, with a high near 74. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 46. Northwest wind 5 to 8 mph becoming north in the evening. Winds could gust as high as 22 mph.
Wednesday
Sunny, with a high near 71.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 79.
Thursday Night
Mostly clear, with a low around 51.
Friday
Sunny, with a high near 77.
Friday Night
Partly cloudy, with a low around 46.
Saturday
A chance of showers. Mostly sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Custer SD
 43.82°N 103.64°W (Elev. 5804 ft)
2:31 pm MDT Sep 6, 2026
2pm MDT Sep 6, 2026-6pm MDT Sep 12, 2026
 
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Additional Resources

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Hourly Weather Forecast

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