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

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

40°F

4°C

Humidity 47%
Wind Speed W 15 G 22 mph
Barometer 29.98 in (1017.4 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 8 Dec 10:53 am MST
Extended Forecast for

Mount Rushmore SD

  • Today

    Today: Partly sunny, with a temperature falling to around 37 by 5pm. Northwest wind 7 to 9 mph, with gusts as high as 23 mph.

    High: 44 °F⇓

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a steady temperature around 37. West wind 6 to 11 mph, with gusts as high as 24 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of rain after 11am, mixing with snow after 4pm. Mostly sunny, with a high near 51. West wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 51 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 29. Northwest wind 5 to 15 mph, with gusts as high as 23 mph.

    Low: 29 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Wednesday

    Wednesday: Snow likely before 3pm, then rain and snow likely. Mostly cloudy, with a high near 42. Calm wind becoming southwest around 5 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow likely, mainly before 11pm. Mostly cloudy, with a low around 32. West wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A 50 percent chance of snow. Mostly cloudy, with a high near 38. Northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.

    High: 38 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Snow likely. Mostly cloudy, with a low around 14. Northwest wind around 5 mph becoming calm after midnight.

    Low: 14 °F

    Snow Likely

  • Friday

    Friday: A chance of snow. Mostly cloudy, with a high near 19.

    High: 19 °F

    Chance Snow

Detailed Forecast

Today
Partly sunny, with a temperature falling to around 37 by 5pm. Northwest wind 7 to 9 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a steady temperature around 37. West wind 6 to 11 mph, with gusts as high as 24 mph.
Tuesday
A chance of rain after 11am, mixing with snow after 4pm. Mostly sunny, with a high near 51. West wind 11 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
A 20 percent chance of snow before 11pm. Partly cloudy, with a low around 29. Northwest wind 5 to 15 mph, with gusts as high as 23 mph.
Wednesday
Snow likely before 3pm, then rain and snow likely. Mostly cloudy, with a high near 42. Calm wind becoming southwest around 5 mph in the afternoon. Winds could gust as high as 16 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday Night
Rain and snow likely, mainly before 11pm. Mostly cloudy, with a low around 32. West wind around 7 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
A 50 percent chance of snow. Mostly cloudy, with a high near 38. Northwest wind 3 to 6 mph. Winds could gust as high as 18 mph.
Thursday Night
Snow likely. Mostly cloudy, with a low around 14. Northwest wind around 5 mph becoming calm after midnight.
Friday
A chance of snow. Mostly cloudy, with a high near 19.
Friday Night
A chance of snow, mainly before 11pm. Mostly cloudy, with a low around 11.
Saturday
A slight chance of snow. Partly sunny, with a high near 32.
Saturday Night
Partly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 45.
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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:
10:06 am MST Dec 8, 2025
Forecast Valid:
11am MST Dec 8, 2025-6pm MST Dec 14, 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