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

61°F

16°C

Humidity 38%
Wind Speed N 9 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 18 Oct 05:00 PM MDT
Extended Forecast for

3 Miles WNW Marysville MT

  • Tonight

    Tonight: Partly cloudy, with a low around 40. Light and variable wind becoming south around 5 mph after midnight.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 62. South southwest wind 5 to 7 mph becoming east in the afternoon.

    High: 62 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. Light and variable wind becoming southwest around 5 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. Light and variable wind becoming northeast around 6 mph in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 41. Northeast wind around 5 mph becoming calm after midnight.

    Low: 41 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 61. South southeast wind 3 to 6 mph.

    High: 61 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45. South southwest wind 3 to 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of rain after noon. Mostly sunny, with a high near 61. South wind 5 to 7 mph.

    High: 61 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Rain Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 40. Light and variable wind becoming south around 5 mph after midnight.
Monday
Mostly sunny, with a high near 62. South southwest wind 5 to 7 mph becoming east in the afternoon.
Monday Night
Mostly cloudy, with a low around 42. Light and variable wind becoming southwest around 5 mph.
Tuesday
Mostly sunny, with a high near 55. Light and variable wind becoming northeast around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 41. Northeast wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 61. South southeast wind 3 to 6 mph.
Wednesday Night
Partly cloudy, with a low around 45. South southwest wind 3 to 5 mph.
Thursday
A slight chance of rain after noon. Mostly sunny, with a high near 61. South wind 5 to 7 mph.
Thursday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 41.
Friday
Rain likely, mainly before noon. Cloudy, with a high near 43.
Friday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 30.
Saturday
Partly sunny, with a high near 41.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 31.
Sunday
A chance of rain and snow. Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Marysville MT
 46.77°N 112.36°W (Elev. 5308 ft)
Last Update:
12:31 pm MDT Oct 18, 2026
Forecast Valid:
5pm MDT Oct 18, 2026-6pm MDT Oct 25, 2026
 
Forecast Discussion
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation