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

Bearmouth I-90 MP 145.8 (MTBRM)

Lat: 46.71854°NLon: 113.29534°WElev: 3901.0ft.

unknown precip

36°F

2°C

Humidity 70%
Wind Speed WSW 5 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 21 Mar 11:45 PM MDT
Extended Forecast for

8 Miles SE Greenough MT

  • Overnight

    Overnight: Mostly clear, with a low around 28. West wind around 5 mph.

    Low: 28 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 46. West wind 5 to 8 mph, with gusts as high as 26 mph.

    High: 46 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. West wind around 6 mph becoming calm  in the evening. Winds could gust as high as 23 mph.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 54. Light and variable wind.

    High: 54 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 37. Light west northwest wind.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of rain after noon.  Snow level rising to 7700 feet in the afternoon. Mostly cloudy, with a high near 53.

    High: 53 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before midnight.  Mostly cloudy, with a low around 38. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Rain Likely
    then Chance
    Rain

  • Wednesday

    Wednesday: A chance of rain.  Snow level 7200 feet lowering to 6200 feet in the afternoon . Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of snow, mainly before midnight.  Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 28. West wind around 5 mph.
Sunday
Sunny, with a high near 46. West wind 5 to 8 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 30. West wind around 6 mph becoming calm in the evening. Winds could gust as high as 23 mph.
Monday
Mostly sunny, with a high near 54. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 37. Light west northwest wind.
Tuesday
A 50 percent chance of rain after noon. Snow level rising to 7700 feet in the afternoon. Mostly cloudy, with a high near 53.
Tuesday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of rain. Snow level 7200 feet lowering to 6200 feet in the afternoon . Partly sunny, with a high near 50.
Wednesday Night
A chance of snow, mainly before midnight. Mostly cloudy, with a low around 29.
Thursday
Sunny, with a high near 42.
Thursday Night
Mostly clear, with a low around 25.
Friday
Sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 28.
Saturday
Mostly sunny, with a high near 55.
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ABOUT THIS FORECAST

 
Point Forecast:
8 Miles SE Greenough MT
 46.83°N 113.33°W (Elev. 5689 ft)
2:01 pm MDT Mar 21, 2026
12am MDT Mar 22, 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