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

48°F

9°C

Humidity 50%
Wind Speed ENE 7 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Wind Chill45°F (7°C)
Last update 20 Apr 10:45 PM MDT
Extended Forecast for

Marysville MT

  • Tonight

    Tonight: Partly cloudy, with a low around 47. Southwest wind around 6 mph.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 73. Southwest wind 5 to 13 mph becoming east southeast in the morning. Winds could gust as high as 23 mph.

    High: 73 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47. South wind 7 to 13 mph, with gusts as high as 22 mph.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 60. South wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%.

    High: 60 °F

    Slight Chance
    Rain then
    Showers

  • Wednesday Night

    Wednesday Night: Rain and snow, becoming all snow after 3am. Some thunder is also possible. Low around 31. Breezy, with a west wind 17 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.

    Low: 31 °F

    Rain/Snow and
    Breezy

  • Thursday

    Thursday: Snow. High near 34. North wind around 16 mph, with gusts as high as 24 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 23. North wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Low: 23 °F

    Snow Likely

  • Friday

    Friday: Snow. Mostly cloudy, with a high near 33. North wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 33 °F

    Snow

  • Friday Night

    Friday Night: A slight chance of snow before midnight. Mostly cloudy, with a low around 21.

    Low: 21 °F

    Slight Chance
    Snow then
    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. Southwest wind around 6 mph.
Tuesday
Increasing clouds, with a high near 73. Southwest wind 5 to 13 mph becoming east southeast in the morning. Winds could gust as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 47. South wind 7 to 13 mph, with gusts as high as 22 mph.
Wednesday
Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 60. South wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%.
Wednesday Night
Rain and snow, becoming all snow after 3am. Some thunder is also possible. Low around 31. Breezy, with a west wind 17 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New snow accumulation of around an inch possible.
Thursday
Snow. High near 34. North wind around 16 mph, with gusts as high as 24 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 23. North wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Friday
Snow. Mostly cloudy, with a high near 33. North wind 10 to 15 mph, with gusts as high as 26 mph.
Friday Night
A slight chance of snow before midnight. Mostly cloudy, with a low around 21.
Saturday
A chance of snow, mainly after noon. Partly sunny, with a high near 37.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
A slight chance of snow. Mostly sunny, with a high near 42.
Sunday Night
Partly cloudy, with a low around 26.
Monday
A chance of snow. Mostly sunny, with a high near 48.
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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:
10:37 pm MDT Apr 20, 2026
Forecast Valid:
11pm MDT Apr 20, 2026-6pm MDT Apr 27, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation