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

78°F

26°C

Humidity 42%
Wind Speed NE 21 MPH
Barometer NA
Dewpoint 53°F (12°C)
Visibility NA
Heat Index79°F (26°C)
Last update 14 Jul 06:30 PM MDT
Extended Forecast for

Marysville MT

  • Tonight

    Tonight: A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Mostly cloudy, with a low around 45. Breezy, with a west northwest wind 15 to 22 mph becoming north northeast after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    Showers and
    Breezy

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm. Temperature falling to around 44 by 4pm. North northeast wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 49 °F⇓

    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before midnight. Cloudy, with a low around 43. North wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.

    Low: 43 °F

    Showers
    Likely then
    Chance
    Showers

  • Wednesday

    Wednesday: A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 62. North wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 18 mph.

    High: 62 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 47. East wind 6 to 8 mph becoming south after midnight.

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. West northwest wind 7 to 14 mph becoming north after midnight. Winds could gust as high as 23 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72. North wind 6 to 8 mph, with gusts as high as 18 mph.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms, then a chance of showers after 9pm. Mostly cloudy, with a low around 45. Breezy, with a west northwest wind 15 to 22 mph becoming north northeast after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 40%.
Tuesday
Showers and possibly a thunderstorm. Temperature falling to around 44 by 4pm. North northeast wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers likely, mainly before midnight. Cloudy, with a low around 43. North wind 14 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Wednesday
A 20 percent chance of showers before noon. Cloudy, then gradually becoming mostly sunny, with a high near 62. North wind 7 to 10 mph becoming east in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly clear, with a low around 47. East wind 6 to 8 mph becoming south after midnight.
Thursday
Sunny, with a high near 74. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 22 mph.
Thursday Night
Mostly clear, with a low around 51. West northwest wind 7 to 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Friday
Sunny, with a high near 72. North wind 6 to 8 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 74.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.32°W (Elev. 6463 ft)
Last Update:
2:23 pm MDT Jul 14, 2025
Forecast Valid:
6pm MDT Jul 14, 2025-6pm MDT Jul 21, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation