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

Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Many locations are likely to set records for the highest-ever March temperature. Periods of critical fire weather will persist from the central Rockies to the central Plains through Saturday as gusty winds and low relative humidity continue. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

67°F

19°C

Humidity 25%
Wind Speed WNW 18 MPH
Barometer NA
Dewpoint 30°F (-1°C)
Visibility NA
Last update 19 Mar 01:00 PM MDT
Extended Forecast for

Garrison MT

  • This Afternoon

    This Afternoon: Sunny, with a high near 71. West wind around 15 mph, with gusts as high as 30 mph.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 39. West wind 5 to 13 mph becoming south after midnight. Winds could gust as high as 24 mph.

    Low: 39 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 72. West wind 5 to 15 mph, with gusts as high as 30 mph.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 22 mph.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: A 50 percent chance of rain. Partly sunny, with a high near 57. Light west wind becoming west northwest 12 to 17 mph in the morning. Winds could gust as high as 30 mph.

    High: 57 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 25.

    Low: 25 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 27.

    Low: 27 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 71. West wind around 15 mph, with gusts as high as 30 mph.
Tonight
Mostly clear, with a low around 39. West wind 5 to 13 mph becoming south after midnight. Winds could gust as high as 24 mph.
Friday
Sunny, with a high near 72. West wind 5 to 15 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 39. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 22 mph.
Saturday
A 50 percent chance of rain. Partly sunny, with a high near 57. Light west wind becoming west northwest 12 to 17 mph in the morning. Winds could gust as high as 30 mph.
Saturday Night
Mostly clear, with a low around 25.
Sunday
Sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 62.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 38.
Wednesday
A chance of rain. Partly sunny, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
Last Update:
12:26 pm MDT Mar 19, 2026
Forecast Valid:
1pm MDT Mar 19, 2026-6pm MDT Mar 25, 2026
 
Forecast Discussion
 
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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation