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

Custer, Custer County Airport (KCUT)

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

Thunderstorm in Vicinity

56°F

13°C

Humidity 93%
Wind Speed NW 5 mph
Barometer 30.32 in (1020.9 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Aug 6:53 am MDT
Extended Forecast for

3 Miles NW Keystone SD

  • Today

    Today: Scattered showers and thunderstorms, mainly before noon. Partly sunny, with a high near 75. Light and variable wind. Winds could gust as high as 17 mph. Chance of precipitation is 30%.

    High: 75 °F

    Scattered
    Showers then
    Slight Chance
    T-storms

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 55. Light and variable wind becoming south around 5 mph after midnight.

    Low: 55 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Showers and thunderstorms likely after noon. Partly sunny, with a high near 75. West wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 60%.

    High: 75 °F

    Mostly Sunny
    then T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly after midnight. Mostly cloudy, with a low around 53. Light and variable wind becoming west around 5 mph. Chance of precipitation is 60%.

    Low: 53 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after noon. Partly sunny, with a high near 72. Light and variable wind. Winds could gust as high as 15 mph. Chance of precipitation is 70%.

    High: 72 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 54. Light and variable wind becoming west 5 to 7 mph after midnight. Winds could gust as high as 17 mph.

    Low: 54 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

Detailed Forecast

Today
Scattered showers and thunderstorms, mainly before noon. Partly sunny, with a high near 75. Light and variable wind. Winds could gust as high as 17 mph. Chance of precipitation is 30%.
Tonight
A 40 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 55. Light and variable wind becoming south around 5 mph after midnight.
Tuesday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 75. West wind around 5 mph becoming calm in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely, mainly after midnight. Mostly cloudy, with a low around 53. Light and variable wind becoming west around 5 mph. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely, mainly after noon. Partly sunny, with a high near 72. Light and variable wind. Winds could gust as high as 15 mph. Chance of precipitation is 70%.
Wednesday Night
Mostly clear, with a low around 54. Light and variable wind becoming west 5 to 7 mph after midnight. Winds could gust as high as 17 mph.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 58.
Friday
Mostly sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Keystone SD
 43.94°N 103.47°W (Elev. 5482 ft)
Last Update:
6:41 am MDT Aug 17, 2026
Forecast Valid:
7am MDT Aug 17, 2026-6pm MDT Aug 23, 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