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

Coastal Storm Along the East Coast; Pacific Storm System in the West on Friday

A strengthening coastal storm will bring soaking rains to portions of the Mid-Atlantic and Northeast, with accumulating snow likely across the higher elevations of northern New England through Friday. A Pacific storm system will bring heavy low elevation rain, and gusty winds to northern California and the Pacific Northwest, as well as possible blizzard conditions to the Sierra Nevada on Friday. Read More >

Current conditions at

Custer, Custer County Airport (KCUT)

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

Fair

47°F

8°C

Humidity 66%
Wind Speed S 3 mph
Barometer 30.10 in (1016.9 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 12 Nov 4:53 pm MST
Extended Forecast for

3 Miles ESE Keystone SD

  • Tonight

    Tonight: Patchy fog between 8pm and 11pm. Otherwise, increasing clouds, with a low around 36. Calm wind.

    Low: 36 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Friday

    Friday: Partly sunny, with a high near 55. Southeast wind 3 to 7 mph. Winds could gust as high as 22 mph.

    High: 55 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 38. South wind 5 to 7 mph, with gusts as high as 17 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 51. South wind 7 to 9 mph, with gusts as high as 25 mph.

    High: 51 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. South wind 5 to 8 mph, with gusts as high as 23 mph.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 58. Light and variable wind becoming south around 6 mph. Winds could gust as high as 16 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 41.

    Low: 41 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog between 8pm and 11pm. Otherwise, increasing clouds, with a low around 36. Calm wind.
Friday
Partly sunny, with a high near 55. Southeast wind 3 to 7 mph. Winds could gust as high as 22 mph.
Friday Night
Mostly cloudy, with a low around 38. South wind 5 to 7 mph, with gusts as high as 17 mph.
Saturday
Mostly sunny, with a high near 51. South wind 7 to 9 mph, with gusts as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 39. South wind 5 to 8 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 58. Light and variable wind becoming south around 6 mph. Winds could gust as high as 16 mph.
Sunday Night
Clear, with a low around 41.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 60.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
A chance of rain. Partly sunny, with a high near 50.
Wednesday Night
A chance of rain and snow. Mostly cloudy, with a low around 37.
Thursday
A slight chance of rain and snow. Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ESE Keystone SD
 43.88°N 103.37°W (Elev. 4400 ft)
Last Update:
3:26 pm MST Nov 12, 2026
Forecast Valid:
5pm MST Nov 12, 2026-6pm MST Nov 19, 2026
 
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Additional Resources

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Chance of Precipitation