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

Sieben I-15 MP 216 (MTSBN)

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

NA

49°F

9°C

Humidity 67%
Wind Speed NNE 19 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 12 Apr 02:00 PM MDT
Extended Forecast for

Marysville MT

  • This Afternoon

    This Afternoon: A chance of showers, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 50. North northeast wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 50 °F

    Showers
    Likely

  • Tonight

    Tonight: Rain showers before 3am, then a chance of rain and snow showers between 3am and 5am, then a slight chance of snow after 5am. Some thunder is also possible. Low around 35. North wind 6 to 9 mph becoming south after midnight. Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 35 °F

    Showers then
    Chance
    Rain/Snow

  • Monday

    Monday: A slight chance of snow before 10am, then a chance of rain and snow between 10am and noon, then a chance of rain after noon. Partly sunny, with a high near 46. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 46 °F

    Chance
    Rain/Snow
    then Chance
    Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 16 to 18 mph, with gusts as high as 32 mph.

    Low: 34 °F

    Chance Rain
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. West southwest wind 14 to 20 mph, with gusts as high as 36 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow between midnight and 3am, then a slight chance of snow after 3am. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

    Low: 35 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of snow before noon, then rain and snow. High near 47. West southwest wind 13 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 47 °F

    Chance Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain and snow, becoming all snow after 9pm. Mostly cloudy, with a low around 26. West wind 16 to 18 mph, with gusts as high as 31 mph.

    Low: 26 °F

    Rain/Snow
    then Snow
    Likely

  • Thursday

    Thursday: Snow. Cloudy, with a high near 32.

    High: 32 °F

    Snow

Detailed Forecast

This Afternoon
A chance of showers, then showers likely and possibly a thunderstorm after 3pm. Mostly cloudy, with a high near 50. North northeast wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain showers before 3am, then a chance of rain and snow showers between 3am and 5am, then a slight chance of snow after 5am. Some thunder is also possible. Low around 35. North wind 6 to 9 mph becoming south after midnight. Chance of precipitation is 90%. Little or no snow accumulation expected.
Monday
A slight chance of snow before 10am, then a chance of rain and snow between 10am and noon, then a chance of rain after noon. Partly sunny, with a high near 46. West wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Monday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 34. West wind 16 to 18 mph, with gusts as high as 32 mph.
Tuesday
Mostly sunny, with a high near 48. West southwest wind 14 to 20 mph, with gusts as high as 36 mph.
Tuesday Night
A slight chance of rain and snow between midnight and 3am, then a slight chance of snow after 3am. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Wednesday
A chance of snow before noon, then rain and snow. High near 47. West southwest wind 13 to 20 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow, becoming all snow after 9pm. Mostly cloudy, with a low around 26. West wind 16 to 18 mph, with gusts as high as 31 mph.
Thursday
Snow. Cloudy, with a high near 32.
Thursday Night
A chance of snow, mainly before midnight. Mostly cloudy, with a low around 22.
Friday
A chance of snow. Partly sunny, with a high near 39.
Friday Night
A chance of snow. Partly cloudy, with a low around 25.
Saturday
A slight chance of snow. Mostly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
Last Update:
12:32 pm MDT Apr 12, 2026
Forecast Valid:
2pm MDT Apr 12, 2026-6pm MDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation