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

43°F

6°C

Humidity 59%
Wind Speed WNW 7 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Wind Chill39°F (4°C)
Last update 21 Mar 07:45 PM MDT
Extended Forecast for

12 Miles W Marysville MT

  • Tonight

    Tonight: Mostly clear, with a low around 21. Windy, with a west wind 33 to 38 mph decreasing to 25 to 30 mph in the evening. Winds could gust as high as 44 mph.

    Low: 21 °F

    Mostly Clear
    and Windy

  • Sunday

    Sunday: Sunny, with a high near 33. Windy, with a west wind 26 to 32 mph, with gusts as high as 37 mph.

    High: 33 °F

    Sunny and
    Windy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25. Breezy, with a west wind 23 to 28 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 33 mph.

    Low: 25 °F

    Mostly Clear
    and Breezy
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 42. West southwest wind 14 to 18 mph, with gusts as high as 25 mph.

    High: 42 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 30. West wind 14 to 21 mph, with gusts as high as 24 mph.

    Low: 30 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of snow, mainly after noon.  Mostly cloudy, with a high near 42. Breezy.  Little or no snow accumulation expected.

    High: 42 °F

    Slight Chance
    Snow then
    Chance Snow
    and Breezy

  • Tuesday Night

    Tuesday Night: Rain and snow likely, mainly before midnight.  Mostly cloudy, with a low around 33. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 33 °F

    Rain/Snow
    Likely

  • Wednesday

    Wednesday: A chance of rain and snow before 3pm, then a chance of snow.  Partly sunny, with a high near 40. Breezy.

    High: 40 °F

    Chance
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: A chance of snow.  Mostly cloudy, with a low around 22. Breezy.

    Low: 22 °F

    Chance Snow
    and Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 21. Windy, with a west wind 33 to 38 mph decreasing to 25 to 30 mph in the evening. Winds could gust as high as 44 mph.
Sunday
Sunny, with a high near 33. Windy, with a west wind 26 to 32 mph, with gusts as high as 37 mph.
Sunday Night
Partly cloudy, with a low around 25. Breezy, with a west wind 23 to 28 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 33 mph.
Monday
Mostly sunny, with a high near 42. West southwest wind 14 to 18 mph, with gusts as high as 25 mph.
Monday Night
Mostly cloudy, with a low around 30. West wind 14 to 21 mph, with gusts as high as 24 mph.
Tuesday
A 50 percent chance of snow, mainly after noon. Mostly cloudy, with a high near 42. Breezy. Little or no snow accumulation expected.
Tuesday Night
Rain and snow likely, mainly before midnight. Mostly cloudy, with a low around 33. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow before 3pm, then a chance of snow. Partly sunny, with a high near 40. Breezy.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 22. Breezy.
Thursday
A slight chance of snow before noon. Sunny, with a high near 30. Breezy.
Thursday Night
Mostly clear, with a low around 19. Breezy.
Friday
Sunny, with a high near 36.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Mostly sunny, with a high near 42.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
2:01 pm MDT Mar 21, 2026
8pm MDT Mar 21, 2026-6pm MDT Mar 28, 2026
 
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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