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

58°F

14°C

Humidity 18%
Wind Speed S 11 MPH
Barometer NA
Dewpoint 15°F (-9°C)
Visibility NA
Last update 18 Apr 05:15 PM MDT
Extended Forecast for

Marysville MT

  • Tonight

    Tonight: Partly cloudy, with a low around 33. West southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 59. West southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 42. West southwest wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 42 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 66. Southwest wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 66 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. Southwest wind 6 to 11 mph becoming south southeast in the afternoon. Winds could gust as high as 24 mph.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. South wind 9 to 14 mph, with gusts as high as 25 mph.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. South wind 9 to 14 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 59 °F

    Showers

  • Wednesday Night

    Wednesday Night: Rain before 9pm, then rain and snow between 9pm and 3am, then snow after 3am. Cloudy, with a low around 31. Blustery.

    Low: 31 °F

    Rain/Snow and
    Blustery

Detailed Forecast

Tonight
Partly cloudy, with a low around 33. West southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 59. West southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 42. West southwest wind 6 to 10 mph, with gusts as high as 21 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 66. Southwest wind 6 to 10 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 44. West wind 6 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 70. Southwest wind 6 to 11 mph becoming south southeast in the afternoon. Winds could gust as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 46. South wind 9 to 14 mph, with gusts as high as 25 mph.
Wednesday
A chance of rain, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 59. South wind 9 to 14 mph becoming west 15 to 20 mph in the afternoon. Winds could gust as high as 32 mph.
Wednesday Night
Rain before 9pm, then rain and snow between 9pm and 3am, then snow after 3am. Cloudy, with a low around 31. Blustery.
Thursday
Snow. Mostly cloudy, with a high near 35. Breezy.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 24.
Friday
A chance of snow. Partly sunny, with a high near 39.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 25.
Saturday
A chance of snow. Partly sunny, with a high near 42.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
Last Update:
2:12 pm MDT Apr 18, 2026
Forecast Valid:
5pm MDT Apr 18, 2026-6pm MDT Apr 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation