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

Storm Impacting the Southwest U.S.

A slow moving weather disturbance will continue to bring periodic rain showers, a few isolated thunderstorms, and a localized flash flooding across the Southwest. The threat will expand into the Southern Plains Wednesday night. Moderate to heavy snow across the Sierra Nevada and southern Utah Ranges will continue into the overnight period. Read More >

Current conditions at

Sieben I-15 MP 216 (MTSBN)

Lat: 46.88748267°NLon: 112.1111196°WElev: 4199.0ft.

NA

42°F

6°C

Humidity 64%
Wind Speed N 2 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 19 Nov 04:00 AM MST
Extended Forecast for

Marysville MT

  • Overnight

    Overnight: A 20 percent chance of snow. Mostly cloudy, with a steady temperature around 31. West wind around 7 mph.

    Low: 31 °F

    Slight Chance
    Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 32. North northwest wind 5 to 7 mph becoming light and variable in the afternoon. Little or no snow accumulation expected.

    High: 32 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 28. South wind 3 to 6 mph.

    Low: 28 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 39. Southwest wind around 7 mph.

    High: 39 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 29. West southwest wind 6 to 14 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 36. West southwest wind around 15 mph, with gusts as high as 26 mph.

    High: 36 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31. West southwest wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of snow. Partly sunny, with a high near 39. West southwest wind 14 to 17 mph, with gusts as high as 25 mph.

    High: 39 °F

    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: A chance of snow after 11pm. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Snow

Detailed Forecast

Overnight
A 20 percent chance of snow. Mostly cloudy, with a steady temperature around 31. West wind around 7 mph.
Wednesday
A 30 percent chance of snow, mainly before noon. Mostly cloudy, with a high near 32. North northwest wind 5 to 7 mph becoming light and variable in the afternoon. Little or no snow accumulation expected.
Wednesday Night
Mostly clear, with a low around 28. South wind 3 to 6 mph.
Thursday
Sunny, with a high near 39. Southwest wind around 7 mph.
Thursday Night
Mostly clear, with a low around 29. West southwest wind 6 to 14 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 36. West southwest wind around 15 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 31. West southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Saturday
A slight chance of snow. Partly sunny, with a high near 39. West southwest wind 14 to 17 mph, with gusts as high as 25 mph.
Saturday Night
A chance of snow after 11pm. Mostly cloudy, with a low around 33.
Sunday
A chance of snow. Partly sunny, with a high near 39.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 33.
Monday
A chance of snow. Partly sunny, with a high near 37.
Monday Night
A chance of snow. Mostly cloudy, with a low around 23.
Tuesday
A chance of snow. Partly sunny, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.32°W (Elev. 6463 ft)
Last Update:
3:17 am MST Nov 19, 2025
Forecast Valid:
4am MST Nov 19, 2025-6pm MST Nov 25, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation