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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Partly Cloudy

73°F

23°C

Humidity 40%
Wind Speed W 13 G 20 mph
Barometer 30.03 in (1010.0 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 8 Aug 12:53 pm MDT
Extended Forecast for

Custer SD

  • This Afternoon

    This Afternoon: A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 77. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 77 °F

    Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 49 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 73. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 73 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51. North wind around 5 mph, with gusts as high as 15 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Northwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 15 mph.

    High: 73 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 52. East wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 77. West wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 54. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.

    Low: 54 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

This Afternoon
A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 77. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 49. Northwest wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 73. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 51. North wind around 5 mph, with gusts as high as 15 mph.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Northwest wind around 5 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Sunday Night
Mostly clear, with a low around 52. East wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 77. West wind around 5 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.
Monday Night
Mostly clear, with a low around 54. Northeast wind around 5 mph becoming calm in the evening. Winds could gust as high as 15 mph.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 58.
Thursday
Sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Custer SD
 43.76°N 103.6°W (Elev. 5417 ft)
Last Update:
12:49 pm MDT Aug 8, 2025
Forecast Valid:
1pm MDT Aug 8, 2025-6pm MDT Aug 14, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation