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

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

29°F

-2°C

Humidity 77%
Wind Speed N 0 MPH
Barometer NA
Dewpoint 23°F (-5°C)
Visibility NA
Last update 03 Mar 01:16 AM MST
Extended Forecast for

Greenough MT

  • Overnight

    Overnight: Patchy fog after 4am. Otherwise, mostly clear, with a low around 23. Calm wind.

    Low: 23 °F

    Patchy Fog

  • Tuesday

    Tuesday: Mostly sunny, with a high near 54. Calm wind.

    High: 54 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 26. Calm wind. Little or no snow accumulation expected.

    Low: 26 °F

    Partly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of rain before 7am, then a chance of snow between 7am and 8am, then rain after 8am. Patchy fog before 7am. High near 47. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 47 °F

    Rain/Snow and
    Patchy Fog
    then Rain

  • Wednesday Night

    Wednesday Night: Rain, mainly before 11pm. Patchy fog between 8pm and 11pm. Snow level 5700 feet lowering to 4400 feet after midnight . Low around 31. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 31 °F

    Rain and
    Patchy Fog

  • Thursday

    Thursday: Snow likely, possibly mixed with rain. Patchy fog before 8am. Snow level 3900 feet. Otherwise, mostly cloudy, with a high near 43. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 43 °F

    Rain/Snow
    Likely and
    Patchy Fog

  • Thursday Night

    Thursday Night: A chance of rain and snow before 8pm, then a chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Friday

    Friday: A chance of snow before 2pm, then a slight chance of rain and snow. Partly sunny, with a high near 43.

    High: 43 °F

    Chance Snow
    then Slight
    Chance
    Rain/Snow

  • Friday Night

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

    Low: 27 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 4am. Otherwise, mostly clear, with a low around 23. Calm wind.
Tuesday
Mostly sunny, with a high near 54. Calm wind.
Tuesday Night
A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 26. Calm wind. Little or no snow accumulation expected.
Wednesday
A chance of rain before 7am, then a chance of snow between 7am and 8am, then rain after 8am. Patchy fog before 7am. High near 47. Calm wind. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain, mainly before 11pm. Patchy fog between 8pm and 11pm. Snow level 5700 feet lowering to 4400 feet after midnight . Low around 31. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Snow likely, possibly mixed with rain. Patchy fog before 8am. Snow level 3900 feet. Otherwise, mostly cloudy, with a high near 43. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday Night
A chance of rain and snow before 8pm, then a chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Friday
A chance of snow before 2pm, then a slight chance of rain and snow. Partly sunny, with a high near 43.
Friday Night
Partly cloudy, with a low around 27.
Saturday
A slight chance of snow before 8am, then a slight chance of rain. Snow level rising to 5700 feet in the afternoon. Mostly cloudy, with a high near 46.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 36.
Sunday
A chance of rain. Mostly cloudy, with a high near 49.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 33.
Monday
Rain and snow likely. Snow level 5400 feet lowering to 4500 feet in the afternoon . Mostly cloudy, with a high near 47.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
Last Update:
11:21 pm MST Mar 2, 2026
Forecast Valid:
1am MST Mar 3, 2026-6pm MDT Mar 9, 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