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

57°F

14°C

Humidity 26%
Wind Speed NW 11 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 28 Mar 07:45 PM MDT
Extended Forecast for

Marysville MT

  • Tonight

    Tonight: Mostly clear, with a low around 35. West southwest wind 8 to 11 mph, with gusts as high as 24 mph.

    Low: 35 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of rain after 3pm. Mostly sunny, with a high near 53. West southwest wind 8 to 18 mph, with gusts as high as 36 mph.

    High: 53 °F

    Sunny then
    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Rain likely before midnight, then rain and snow likely between midnight and 2am, then snow likely after 2am. Mostly cloudy, with a low around 33. West wind 11 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 33 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Snow likely, mainly between 7am and 9am. Partly sunny, with a high near 34. Breezy, with a west wind 15 to 20 mph increasing to 21 to 26 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 34 °F

    Breezy. Snow
    Likely then
    Chance Snow

  • Monday Night

    Monday Night: A 20 percent chance of snow before midnight. Mostly clear, with a low around 18. Blustery, with a west northwest wind 20 to 25 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 43 mph.

    Low: 18 °F

    Slight Chance
    Snow and
    Blustery then
    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 42. Southeast wind 5 to 9 mph, with gusts as high as 22 mph.

    High: 42 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 28. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 28 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A slight chance of snow between noon and 3pm, then a slight chance of rain after 3pm. Mostly sunny, with a high near 51. South southwest wind 7 to 14 mph, with gusts as high as 26 mph.

    High: 51 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain likely before 9pm, then rain and snow likely. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Rain/Snow
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 35. West southwest wind 8 to 11 mph, with gusts as high as 24 mph.
Sunday
A 20 percent chance of rain after 3pm. Mostly sunny, with a high near 53. West southwest wind 8 to 18 mph, with gusts as high as 36 mph.
Sunday Night
Rain likely before midnight, then rain and snow likely between midnight and 2am, then snow likely after 2am. Mostly cloudy, with a low around 33. West wind 11 to 17 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday
Snow likely, mainly between 7am and 9am. Partly sunny, with a high near 34. Breezy, with a west wind 15 to 20 mph increasing to 21 to 26 mph in the morning. Winds could gust as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
A 20 percent chance of snow before midnight. Mostly clear, with a low around 18. Blustery, with a west northwest wind 20 to 25 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 43 mph.
Tuesday
Mostly sunny, with a high near 42. Southeast wind 5 to 9 mph, with gusts as high as 22 mph.
Tuesday Night
Partly cloudy, with a low around 28. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of snow between noon and 3pm, then a slight chance of rain after 3pm. Mostly sunny, with a high near 51. South southwest wind 7 to 14 mph, with gusts as high as 26 mph.
Wednesday Night
Rain likely before 9pm, then rain and snow likely. Mostly cloudy, with a low around 32.
Thursday
Snow. Cloudy, with a high near 39. Breezy.
Thursday Night
Snow likely. Mostly cloudy, with a low around 27. Breezy.
Friday
Snow likely. Mostly cloudy, with a high near 38. Breezy.
Friday Night
A chance of snow. Mostly cloudy, with a low around 28. Blustery.
Saturday
A slight chance of snow. Mostly sunny, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
Last Update:
6:41 pm MDT Mar 28, 2026
Forecast Valid:
8pm MDT Mar 28, 2026-6pm MDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation