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

81°F

27°C

Humidity 20%
Wind Speed NW 17 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Heat Index79°F (26°C)
Last update 03 Aug 02:15 PM MDT
Extended Forecast for

Marysville MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. West wind around 10 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 57. West wind 5 to 9 mph becoming light west southwest after midnight.

    Low: 57 °F

    Increasing
    Clouds

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 76. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 76 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 52. West wind 8 to 10 mph. Chance of precipitation is 70%.

    Low: 52 °F

    Showers
    Likely then
    Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 70. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    High: 70 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54. West southwest wind 6 to 11 mph, with gusts as high as 22 mph.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. West southwest wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57. West wind 6 to 9 mph.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny
    then Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 76. West wind around 10 mph, with gusts as high as 20 mph.
Tonight
Increasing clouds, with a low around 57. West wind 5 to 9 mph becoming light west southwest after midnight.
Monday
A 40 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 76. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Monday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 52. West wind 8 to 10 mph. Chance of precipitation is 70%.
Tuesday
Mostly sunny, with a high near 70. West southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday Night
Partly cloudy, with a low around 54. West southwest wind 6 to 11 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 75. West southwest wind 6 to 10 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 57. West wind 6 to 9 mph.
Thursday
A chance of showers and thunderstorms after noon. Partly sunny, with a high near 71.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 64.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51.
Saturday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 64.
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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:
2:12 pm MDT Aug 3, 2025
Forecast Valid:
2pm MDT Aug 3, 2025-6pm MDT Aug 9, 2025
 
Forecast Discussion
 
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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