National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

Lat: 46.52361°NLon: 112.80843°WElev: 4327.0ft.

NA

23°F

-5°C

Humidity 83%
Wind Speed W 0 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 10 Apr 06:45 AM MDT
Extended Forecast for

12 Miles W Marysville MT

  • Today

    Today: Mostly sunny, with a high near 50. South wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain before midnight. Snow level 9000 feet. Mostly cloudy, with a low around 36. East wind 14 to 17 mph becoming southwest after midnight. Winds could gust as high as 28 mph.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

  • Saturday

    Saturday: A slight chance of rain before 9am, then rain and snow. Some thunder is also possible. Snow level 8600 feet. High near 48. Breezy, with a southwest wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 48 °F

    Slight Chance
    Rain/Snow
    then
    Rain/Snow and
    Breezy

  • Saturday Night

    Saturday Night: Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 32. Breezy, with a west southwest wind 17 to 23 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Rain/Snow
    Likely and
    Breezy then
    Chance Snow

  • Sunday

    Sunday: Snow, mainly after noon. High near 43. Southwest wind 15 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 43 °F

    Chance Snow
    then Snow

  • Sunday Night

    Sunday Night: Snow. Low around 31. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 31 °F

    Snow

  • Monday

    Monday: Snow before noon, then snow showers after noon. Some thunder is also possible. High near 34. Breezy. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 34 °F

    Snow and
    Breezy

  • Monday Night

    Monday Night: A chance of snow, mainly before midnight. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

  • Tuesday

    Tuesday: A chance of snow, mainly before noon. Partly sunny, with a high near 34. Breezy.

    High: 34 °F

    Chance Snow
    and Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 50. South wind 10 to 14 mph, with gusts as high as 21 mph.
Tonight
A 30 percent chance of rain before midnight. Snow level 9000 feet. Mostly cloudy, with a low around 36. East wind 14 to 17 mph becoming southwest after midnight. Winds could gust as high as 28 mph.
Saturday
A slight chance of rain before 9am, then rain and snow. Some thunder is also possible. Snow level 8600 feet. High near 48. Breezy, with a southwest wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 46 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Saturday Night
Rain and snow likely, becoming all snow after 9pm. Mostly cloudy, with a low around 32. Breezy, with a west southwest wind 17 to 23 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday
Snow, mainly after noon. High near 43. Southwest wind 15 to 17 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow. Low around 31. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Monday
Snow before noon, then snow showers after noon. Some thunder is also possible. High near 34. Breezy. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Monday Night
A chance of snow, mainly before midnight. Mostly cloudy, with a low around 27.
Tuesday
A chance of snow, mainly before noon. Partly sunny, with a high near 34. Breezy.
Tuesday Night
A chance of snow after midnight. Mostly cloudy, with a low around 27. Breezy.
Wednesday
Snow. Mostly cloudy, with a high near 31. Breezy.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 22. Breezy.
Thursday
A chance of snow. Mostly cloudy, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
Last Update:
2:01 am MDT Apr 10, 2026
Forecast Valid:
7am MDT Apr 10, 2026-6pm MDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation