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

43°F

6°C

Humidity 58%
Wind Speed W 14 G 32 mph
Barometer 29.67 in (1002.6 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 4 Jan 10:53 pm MST
Extended Forecast for

Keystone SD

  • Tonight

    Tonight: Partly cloudy, with a low around 37. West wind 7 to 9 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Increasing clouds, with a high near 55. West wind 5 to 8 mph becoming light and variable in the afternoon. Winds could gust as high as 20 mph.

    High: 55 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Calm wind becoming west around 6 mph after midnight. Winds could gust as high as 17 mph.

    Low: 33 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Sunny, with a high near 47. West wind 3 to 7 mph. Winds could gust as high as 23 mph.

    High: 47 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a steady temperature around 37. West wind 3 to 7 mph. Winds could gust as high as 21 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 50. West wind around 7 mph, with gusts as high as 23 mph.

    High: 50 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 25. Northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.

    Low: 25 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 42. West wind 3 to 7 mph. Winds could gust as high as 21 mph.

    High: 42 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of snow. Partly cloudy, with a low around 23.

    Low: 23 °F

    Slight Chance
    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. West wind 7 to 9 mph, with gusts as high as 25 mph.
Monday
Increasing clouds, with a high near 55. West wind 5 to 8 mph becoming light and variable in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 33. Calm wind becoming west around 6 mph after midnight. Winds could gust as high as 17 mph.
Tuesday
Sunny, with a high near 47. West wind 3 to 7 mph. Winds could gust as high as 23 mph.
Tuesday Night
Partly cloudy, with a steady temperature around 37. West wind 3 to 7 mph. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 50. West wind around 7 mph, with gusts as high as 23 mph.
Wednesday Night
Partly cloudy, with a low around 25. Northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.
Thursday
Partly sunny, with a high near 42. West wind 3 to 7 mph. Winds could gust as high as 21 mph.
Thursday Night
A slight chance of snow. Partly cloudy, with a low around 23.
Friday
Mostly sunny, with a high near 37.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 27.
Sunday
Sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.89°N 103.43°W (Elev. 4541 ft)
Last Update:
8:36 pm MST Jan 4, 2026
Forecast Valid:
11pm MST Jan 4, 2026-6pm MST Jan 11, 2026
 
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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