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

26°F

-3°C

Humidity 72%
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 28 Mar 07:00 AM MDT
Extended Forecast for

Marysville MT

  • Today

    Today: Partly sunny, with a high near 55. Southwest wind 7 to 17 mph, with gusts as high as 29 mph.

    High: 55 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 35. West wind 8 to 18 mph, with gusts as high as 30 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 52. West southwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 52 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Sunday Night

    Sunday Night: Rain likely before midnight, then rain and snow likely between midnight and 3am, then snow likely after 3am. Mostly cloudy, with a low around 30. West wind 13 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Snow likely, mainly before noon. Partly sunny, with a high near 35. Breezy, with a west wind 20 to 29 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 35 °F

    Breezy. Snow
    Likely then
    Chance Snow

  • Monday Night

    Monday Night: A 20 percent chance of snow before midnight. Partly cloudy, with a low around 20. Breezy, with a west wind 18 to 23 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 39 mph.

    Low: 20 °F

    Slight Chance
    Snow and
    Breezy then
    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 41. South wind 5 to 9 mph, with gusts as high as 21 mph.

    High: 41 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 28 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of snow between noon and 3pm, then a chance of rain after 3pm. Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny
    then Chance
    Rain/Snow

Detailed Forecast

Today
Partly sunny, with a high near 55. Southwest wind 7 to 17 mph, with gusts as high as 29 mph.
Tonight
Partly cloudy, with a low around 35. West wind 8 to 18 mph, with gusts as high as 30 mph.
Sunday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 52. West southwest wind 7 to 12 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 33 mph.
Sunday Night
Rain likely before midnight, then rain and snow likely between midnight and 3am, then snow likely after 3am. Mostly cloudy, with a low around 30. West wind 13 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday
Snow likely, mainly before noon. Partly sunny, with a high near 35. Breezy, with a west wind 20 to 29 mph, with gusts as high as 49 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 20. Breezy, with a west wind 18 to 23 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 39 mph.
Tuesday
Mostly sunny, with a high near 41. South wind 5 to 9 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 28. West southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Wednesday
A chance of snow between noon and 3pm, then a chance of rain after 3pm. Partly sunny, with a high near 51.
Wednesday Night
Rain likely before 9pm, then rain and snow likely. Mostly cloudy, with a low around 32.
Thursday
Snow. Mostly cloudy, with a high near 39. Breezy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 27. Breezy.
Friday
Snow likely. Mostly cloudy, with a high near 38.
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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:
3:17 am MDT Mar 28, 2026
Forecast Valid:
7am MDT Mar 28, 2026-6pm MDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation