Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

56°F

13°C

Humidity 47%
Wind Speed W 5 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 20 Mar 11:15 AM MDT
Extended Forecast for

12 Miles W Marysville MT

  • Today

    Today: Sunny, with a high near 50. Windy, with a west southwest wind 37 to 40 mph, with gusts as high as 50 mph.

    High: 50 °F

    Sunny and
    Windy

  • Tonight

    Tonight: Partly cloudy, with a low around 36. Windy, with a west southwest wind 21 to 30 mph, with gusts as high as 36 mph.

    Low: 36 °F

    Partly Cloudy
    and Windy

  • Saturday

    Saturday: A chance of rain and snow before 9am, then snow.  High near 39. Windy, with a west wind 22 to 27 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 41 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Chance
    Rain/Snow and
    Breezy then
    Snow and
    Windy

  • Saturday Night

    Saturday Night: A 20 percent chance of snow before midnight.  Partly cloudy, with a low around 24. Windy, with a west wind 33 to 38 mph decreasing to 25 to 30 mph after midnight. Winds could gust as high as 41 mph.

    Low: 24 °F

    Slight Chance
    Snow and
    Windy then
    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 33. Breezy, with a west wind around 26 mph, with gusts as high as 34 mph.

    High: 33 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 24. Windy.

    Low: 24 °F

    Partly Cloudy
    and Windy
    then Partly
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow before noon, then a chance of rain and snow.  Mostly cloudy, with a high near 43.

    High: 43 °F

    Slight Chance
    Snow then
    Chance
    Rain/Snow

Detailed Forecast

Today
Sunny, with a high near 50. Windy, with a west southwest wind 37 to 40 mph, with gusts as high as 50 mph.
Tonight
Partly cloudy, with a low around 36. Windy, with a west southwest wind 21 to 30 mph, with gusts as high as 36 mph.
Saturday
A chance of rain and snow before 9am, then snow. High near 39. Windy, with a west wind 22 to 27 mph increasing to 29 to 34 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Saturday Night
A 20 percent chance of snow before midnight. Partly cloudy, with a low around 24. Windy, with a west wind 33 to 38 mph decreasing to 25 to 30 mph after midnight. Winds could gust as high as 41 mph.
Sunday
Sunny, with a high near 33. Breezy, with a west wind around 26 mph, with gusts as high as 34 mph.
Sunday Night
Partly cloudy, with a low around 24. Windy.
Monday
Mostly cloudy, with a high near 39.
Monday Night
Mostly cloudy, with a low around 27.
Tuesday
A slight chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 43.
Tuesday Night
A chance of rain and snow before 9pm, then a chance of rain between 9pm and midnight, then a chance of rain and snow after midnight. Mostly cloudy, with a low around 35.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 39. Breezy.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 21. Breezy.
Thursday
A chance of snow. Partly sunny, with a high near 28. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
2:01 am MDT Mar 20, 2026
11am MDT Mar 20, 2026-6pm MDT Mar 26, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database