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

29°F

-2°C

Humidity 74%
Wind Speed S 1 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 09 Apr 02:00 AM MDT
Extended Forecast for

Marysville MT

  • Overnight

    Overnight: Mostly clear, with a low around 32. West wind around 9 mph.

    Low: 32 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 50. West northwest wind 6 to 9 mph becoming northeast in the afternoon.

    High: 50 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33. Northeast wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 18 mph.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 60. Light and variable wind becoming east southeast 5 to 8 mph in the morning.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 42. East wind 5 to 9 mph becoming west in the evening. Winds could gust as high as 18 mph.

    Low: 42 °F

    Chance
    Showers then
    Mostly Cloudy

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 3pm. Partly sunny, with a high near 62. South southwest wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.

    High: 62 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before midnight. Mostly cloudy, with a low around 38. West southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: A chance of showers, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 48. West wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 23 mph.

    High: 48 °F

    Showers

  • Sunday Night

    Sunday Night: Rain before midnight, then rain and snow. Cloudy, with a low around 35.

    Low: 35 °F

    Rain then
    Rain/Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 32. West wind around 9 mph.
Thursday
Sunny, with a high near 50. West northwest wind 6 to 9 mph becoming northeast in the afternoon.
Thursday Night
Mostly clear, with a low around 33. Northeast wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Friday
Mostly sunny, with a high near 60. Light and variable wind becoming east southeast 5 to 8 mph in the morning.
Friday Night
A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 42. East wind 5 to 9 mph becoming west in the evening. Winds could gust as high as 18 mph.
Saturday
Showers likely, with thunderstorms also possible after 3pm. Partly sunny, with a high near 62. South southwest wind 6 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%.
Saturday Night
Showers likely, mainly before midnight. Mostly cloudy, with a low around 38. West southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Sunday
A chance of showers, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 48. West wind 7 to 13 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Sunday Night
Rain before midnight, then rain and snow. Cloudy, with a low around 35.
Monday
Rain and snow. Cloudy, with a high near 43.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 32.
Tuesday
A slight chance of snow. Mostly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 49. Breezy.
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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:
12:31 am MDT Apr 9, 2026
Forecast Valid:
2am MDT Apr 9, 2026-6pm MDT Apr 15, 2026
 
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