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

56°F

13°C

Humidity 62%
Wind Speed NE 8 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 18 Jun 10:30 PM MDT
Extended Forecast for

Marysville MT

  • Tonight

    Tonight: Mostly clear, with a low around 44. North wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 44 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 68. North wind 5 to 8 mph becoming east in the afternoon.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 49. North northeast wind 5 to 9 mph becoming calm after midnight.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of showers between 1pm and 3pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 73. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    High: 73 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before midnight. Partly cloudy, with a low around 51. West wind 9 to 11 mph, with gusts as high as 23 mph.

    Low: 51 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 66. West wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46. North wind 7 to 15 mph, with gusts as high as 25 mph.

    Low: 46 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. North northeast wind 5 to 9 mph.

    High: 63 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 44. North wind 5 to 10 mph, with gusts as high as 18 mph.
Juneteenth
Mostly sunny, with a high near 68. North wind 5 to 8 mph becoming east in the afternoon.
Friday Night
Partly cloudy, with a low around 49. North northeast wind 5 to 9 mph becoming calm after midnight.
Saturday
A slight chance of showers between 1pm and 3pm, then a slight chance of showers and thunderstorms after 3pm. Partly sunny, with a high near 73. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 20%.
Saturday Night
A 30 percent chance of showers before midnight. Partly cloudy, with a low around 51. West wind 9 to 11 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 66. West wind 7 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 46. North wind 7 to 15 mph, with gusts as high as 25 mph.
Monday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 63. North northeast wind 5 to 9 mph.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 50.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marysville MT
 46.75°N 112.29°W (Elev. 5456 ft)
Last Update:
9:36 pm MDT Jun 18, 2026
Forecast Valid:
10pm MDT Jun 18, 2026-6pm MDT Jun 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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