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

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

28°F

-2°C

Humidity 66%
Wind Speed NW 6 mph
Barometer 30.05 in (1018.9 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 10 Dec 2:53 am MST
Extended Forecast for

Mount Rushmore SD

  • Overnight

    Overnight: Mostly cloudy, with a low around 28. Northwest wind around 9 mph, with gusts as high as 25 mph.

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow between 11am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 44. West wind around 6 mph becoming light and variable. Winds could gust as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 44 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain before 8pm. Partly cloudy, with a temperature rising to around 47 by 3am. West wind 8 to 10 mph, with gusts as high as 25 mph.

    Low: 40 °F⇑

    Chance Rain
    then Partly
    Cloudy

  • Thursday

    Thursday: Rain likely, mainly after 5pm. Mostly sunny, with a temperature rising to near 54 by 11am, then falling to around 43 during the remainder of the day. West wind around 8 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 54 °F⇓

    Slight Chance
    Rain then
    Rain Likely

  • Thursday Night

    Thursday Night: Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 25. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Friday

    Friday: Snow likely. Mostly cloudy, with a temperature falling to around 21 by 5pm. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 29 °F⇓

    Snow Likely

  • Friday Night

    Friday Night: A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Chance Snow

  • Saturday

    Saturday: A chance of snow, mainly before 11am. Partly sunny, with a high near 29. Calm wind.

    High: 29 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 28. Northwest wind around 9 mph, with gusts as high as 25 mph.
Wednesday
A chance of snow between 11am and 4pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 44. West wind around 6 mph becoming light and variable. Winds could gust as high as 22 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Wednesday Night
A 40 percent chance of rain before 8pm. Partly cloudy, with a temperature rising to around 47 by 3am. West wind 8 to 10 mph, with gusts as high as 25 mph.
Thursday
Rain likely, mainly after 5pm. Mostly sunny, with a temperature rising to near 54 by 11am, then falling to around 43 during the remainder of the day. West wind around 8 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Thursday Night
Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 25. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday
Snow likely. Mostly cloudy, with a temperature falling to around 21 by 5pm. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Friday Night
A 30 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around 18. Calm wind.
Saturday
A chance of snow, mainly before 11am. Partly sunny, with a high near 29. Calm wind.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Sunny, with a high near 53.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 37.
Tuesday
Mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Rushmore SD
 43.87°N 103.46°W (Elev. 5000 ft)
Last Update:
3:37 am MST Dec 10, 2025
Forecast Valid:
3am MST Dec 10, 2025-6pm MST Dec 16, 2025
 
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