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

59°F

15°C

Humidity 32%
Wind Speed ESE 8 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 20 Apr 10:00 AM MDT
Extended Forecast for

Marysville MT

  • Today

    Today: Sunny, with a high near 67. West southwest wind 6 to 11 mph becoming south southeast in the morning. Winds could gust as high as 22 mph.

    High: 67 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Southwest wind 5 to 11 mph, with gusts as high as 22 mph.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 23 mph.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46. South wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 59. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%.

    High: 59 °F

    Chance Rain
    then Showers

  • Wednesday Night

    Wednesday Night: Rain showers before 9pm, then rain and snow between 9pm and midnight, then snow after midnight. Some thunder is also possible. Low around 31. Blustery, with a west wind 18 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 31 °F

    Rain/Snow and
    Blustery then
    Snow

  • Thursday

    Thursday: Snow. High near 34. North wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 34 °F

    Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 24. North northwest wind 13 to 18 mph, with gusts as high as 30 mph.

    Low: 24 °F

    Snow Likely

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 34.

    High: 34 °F

    Snow Likely

Detailed Forecast

Today
Sunny, with a high near 67. West southwest wind 6 to 11 mph becoming south southeast in the morning. Winds could gust as high as 22 mph.
Tonight
Partly cloudy, with a low around 47. Southwest wind 5 to 11 mph, with gusts as high as 22 mph.
Tuesday
Mostly sunny, with a high near 71. Southwest wind 5 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 46. South wind 7 to 13 mph, with gusts as high as 22 mph.
Wednesday
A chance of rain before noon, then showers between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 59. South southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%.
Wednesday Night
Rain showers before 9pm, then rain and snow between 9pm and midnight, then snow after midnight. Some thunder is also possible. Low around 31. Blustery, with a west wind 18 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow. High near 34. North wind 15 to 17 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 24. North northwest wind 13 to 18 mph, with gusts as high as 30 mph.
Friday
Snow likely. Mostly cloudy, with a high near 34.
Friday Night
A slight chance of snow before midnight. Mostly cloudy, with a low around 22.
Saturday
A chance of snow. Mostly sunny, with a high near 36.
Saturday Night
A slight chance of snow. Mostly cloudy, with a low around 24.
Sunday
A chance of snow. Partly sunny, with a high near 39.
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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:
9:31 am MDT Apr 20, 2026
Forecast Valid:
10am MDT Apr 20, 2026-6pm MDT Apr 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation