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.

Fair

55°F

13°C

Humidity 87%
Wind Speed NW 7 mph
Barometer 30.30 in (1020.3 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 17 Aug 1:53 am MDT
Extended Forecast for

Keystone SD

  • Overnight

    Overnight: Mostly clear, with a low around 58. West wind 3 to 5 mph. Winds could gust as high as 15 mph.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Partly sunny, with a high near 83. West wind around 5 mph becoming calm in the morning. Winds could gust as high as 17 mph.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 59. Light and variable wind.

    Low: 59 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79. Calm wind becoming northeast around 5 mph. Winds could gust as high as 17 mph.

    High: 79 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, mainly after midnight. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 60%.

    Low: 56 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after noon. Partly sunny, with a high near 76. Calm wind becoming east around 5 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.

    High: 76 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 58. West wind 3 to 5 mph. Winds could gust as high as 15 mph.
Monday
A 30 percent chance of showers and thunderstorms, mainly between noon and 3pm. Partly sunny, with a high near 83. West wind around 5 mph becoming calm in the morning. Winds could gust as high as 17 mph.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 59. Light and variable wind.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 79. Calm wind becoming northeast around 5 mph. Winds could gust as high as 17 mph.
Tuesday Night
Showers and thunderstorms likely, mainly after midnight. Mostly cloudy, with a low around 56. Light and variable wind. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely, mainly after noon. Partly sunny, with a high near 76. Calm wind becoming east around 5 mph. Winds could gust as high as 15 mph. Chance of precipitation is 60%.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 84.
Friday Night
Mostly clear, with a low around 61.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Sunday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.89°N 103.43°W (Elev. 4541 ft)
Last Update:
1:21 am MDT Aug 17, 2026
Forecast Valid:
2am MDT Aug 17, 2026-6pm MDT Aug 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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