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.

unknown precip

38°F

3°C

Humidity NA
Wind Speed NW 2 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

Marysville MT

  • Overnight

    Overnight: A chance of rain and snow, mainly before 4am. Patchy fog before 4am. Otherwise, mostly cloudy, with a low around 34. Southwest wind 6 to 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 34 °F

    Chance
    Rain/Snow and
    Patchy Fog

  • Monday

    Monday: A chance of rain and snow before 3pm, then rain likely. Partly sunny, with a high near 47. West southwest wind 9 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 47 °F

    Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain between 9pm and midnight. Partly cloudy, with a low around 33. West wind 15 to 20 mph, with gusts as high as 33 mph.

    Low: 33 °F

    Chance Rain
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. West southwest wind 16 to 20 mph, with gusts as high as 36 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.

    Low: 35 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then rain between noon and 3pm, then rain and snow after 3pm. High near 47. West southwest wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 47 °F

    Chance
    Rain/Snow
    then
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 26. West southwest wind 15 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 26 °F

    Snow

  • Thursday

    Thursday: Snow. Cloudy, with a high near 30. West northwest wind 14 to 18 mph, with gusts as high as 32 mph.

    High: 30 °F

    Snow

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 21.

    Low: 21 °F

    Chance Snow

Detailed Forecast

Overnight
A chance of rain and snow, mainly before 4am. Patchy fog before 4am. Otherwise, mostly cloudy, with a low around 34. Southwest wind 6 to 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday
A chance of rain and snow before 3pm, then rain likely. Partly sunny, with a high near 47. West southwest wind 9 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Monday Night
A 30 percent chance of rain between 9pm and midnight. Partly cloudy, with a low around 33. West wind 15 to 20 mph, with gusts as high as 33 mph.
Tuesday
Mostly sunny, with a high near 48. West southwest wind 16 to 20 mph, with gusts as high as 36 mph.
Tuesday Night
A slight chance of rain and snow after midnight. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 14 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 20%.
Wednesday
A chance of rain and snow before noon, then rain between noon and 3pm, then rain and snow after 3pm. High near 47. West southwest wind 13 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Snow. Low around 26. West southwest wind 15 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow. Cloudy, with a high near 30. West northwest wind 14 to 18 mph, with gusts as high as 32 mph.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 21.
Friday
A chance of snow. Partly sunny, with a high near 38.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 24.
Saturday
A slight chance of snow. Sunny, with a high near 47.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
A slight chance of rain and snow. Mostly sunny, with a high near 55.
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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:
12:27 am MDT Apr 13, 2026
Forecast Valid:
3am MDT Apr 13, 2026-6pm MDT Apr 19, 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