Active Spring Like Pattern Across the Country

A frontal boundary will slowly move eastward and clear most of the eastern seaboard by Sunday. Showers and thunderstorms, some severe, will accompany this front alongside the threat of heavy rainfall; These threats may linger along the Gulf Coast states into early next week. Meanwhile, record spring-like warmth is forecast, mainly east of the Mississippi River, this weekend into next week. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

Partly Cloudy

47°F

8°C

Humidity 24%
Wind Speed W 16 G 33 mph
Barometer 29.82 in (1010.8 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 7 Mar 2:53 pm MST
Extended Forecast for

Keystone SD

  • Tonight

    Tonight: Partly cloudy, with a low around 40. West wind around 8 mph, with gusts as high as 26 mph.

    Low: 40 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. West wind 8 to 10 mph, with gusts as high as 15 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. West wind around 6 mph, with gusts as high as 18 mph.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 63. Southwest wind 6 to 10 mph, with gusts as high as 29 mph.

    High: 63 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 11pm, then a chance of snow after 11pm.  Mostly cloudy, with a low around 27. North wind 3 to 7 mph. Winds could gust as high as 23 mph.  Chance of precipitation is 30%.

    Low: 27 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Tuesday

    Tuesday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 39. Northeast wind 3 to 7 mph. Winds could gust as high as 21 mph.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    High: 39 °F

    Snow Likely

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before 11pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 23. North wind 5 to 9 mph becoming light and variable. Winds could gust as high as 20 mph.  Chance of precipitation is 60%.

    Low: 23 °F

    Snow Likely
    then Chance
    Snow

  • Wednesday

    Wednesday: A slight chance of snow after 11am.  Mostly sunny, with a high near 42. Northwest wind 7 to 11 mph, with gusts as high as 33 mph.

    High: 42 °F

    Slight Chance
    Snow

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. West wind around 8 mph, with gusts as high as 26 mph.
Sunday
Sunny, with a high near 66. West wind 8 to 10 mph, with gusts as high as 15 mph.
Sunday Night
Mostly clear, with a low around 39. West wind around 6 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 63. Southwest wind 6 to 10 mph, with gusts as high as 29 mph.
Monday Night
A slight chance of rain before 9pm, then a slight chance of rain and snow between 9pm and 11pm, then a chance of snow after 11pm. Mostly cloudy, with a low around 27. North wind 3 to 7 mph. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Tuesday
Snow likely, mainly after 11am. Mostly cloudy, with a high near 39. Northeast wind 3 to 7 mph. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Tuesday Night
Snow likely, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 23. North wind 5 to 9 mph becoming light and variable. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Wednesday
A slight chance of snow after 11am. Mostly sunny, with a high near 42. Northwest wind 7 to 11 mph, with gusts as high as 33 mph.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 66.
Thursday Night
A chance of rain and snow. Mostly cloudy, with a low around 32.
Friday
A chance of snow. Mostly cloudy, with a high near 44.
Friday Night
A chance of snow. Mostly cloudy, with a low around 26.
Saturday
A chance of snow. Mostly cloudy, with a high near 49.
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ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.89°N 103.43°W (Elev. 4541 ft)
2:27 pm MST Mar 7, 2026
3pm MST Mar 7, 2026-6pm MDT Mar 14, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database