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

Storm Systems to Impact the Central and Eastern U.S. Through the Weekend

Two storm systems will track through the central and eastern U.S. today through this weekend with areas of gusty winds, rain and heavy snow. Severe thunderstorms and heavy to excessive rainfall is forecast today from the Lower Mississippi River Valley to the Tennessee Valley. Damaging winds, a few tornadoes, and areas of flooding are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Custer, Custer County Airport (KCUT)

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

A Few Clouds

24°F

-4°C

Humidity 44%
Wind Speed NW 12 G 26 mph
Barometer 30.10 in (1023.7 mb)
Dewpoint 5°F (-15°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 9 Jan 11:53 am MST
Extended Forecast for

Keystone SD

  • This Afternoon

    This Afternoon: Sunny, with a temperature falling to around 27 by 5pm. Wind chill values as low as 19. Northwest wind 8 to 14 mph, with gusts as high as 29 mph.

    High: 31 °F⇓

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a steady temperature around 27. Wind chill values as low as 18. West wind 7 to 10 mph, with gusts as high as 29 mph.

    Low: 27 °F

    Partly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow, mainly before 11am. Mostly sunny, with a high near 40. Wind chill values as low as 19. Northwest wind 7 to 11 mph, with gusts as high as 38 mph.

    High: 40 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a temperature falling to near 33 by 8pm, then rising to around 38 during the remainder of the night. West wind around 7 mph, with gusts as high as 21 mph.

    Low: 33 °F⇑

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 53. West wind around 8 mph, with gusts as high as 25 mph.

    High: 53 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 37. West wind around 7 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 57. West wind 7 to 10 mph, with gusts as high as 29 mph.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 41. Northwest wind 8 to 13 mph, with gusts as high as 36 mph.

    Low: 41 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of rain after 11am. Partly sunny, with a high near 49.

    High: 49 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
Sunny, with a temperature falling to around 27 by 5pm. Wind chill values as low as 19. Northwest wind 8 to 14 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a steady temperature around 27. Wind chill values as low as 18. West wind 7 to 10 mph, with gusts as high as 29 mph.
Saturday
A 30 percent chance of snow, mainly before 11am. Mostly sunny, with a high near 40. Wind chill values as low as 19. Northwest wind 7 to 11 mph, with gusts as high as 38 mph.
Saturday Night
Partly cloudy, with a temperature falling to near 33 by 8pm, then rising to around 38 during the remainder of the night. West wind around 7 mph, with gusts as high as 21 mph.
Sunday
Mostly sunny, with a high near 53. West wind around 8 mph, with gusts as high as 25 mph.
Sunday Night
Partly cloudy, with a low around 37. West wind around 7 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 57. West wind 7 to 10 mph, with gusts as high as 29 mph.
Monday Night
Mostly cloudy, with a low around 41. Northwest wind 8 to 13 mph, with gusts as high as 36 mph.
Tuesday
A slight chance of rain after 11am. Partly sunny, with a high near 49.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
Mostly sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Keystone SD
 43.87°N 103.4°W (Elev. 4413 ft)
Last Update:
10:46 am MST Jan 9, 2026
Forecast Valid:
12pm MST Jan 9, 2026-6pm MST Jan 15, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation