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

60°F

16°C

Humidity 23%
Wind Speed WNW 9 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 08 Apr 05:30 PM MDT
Extended Forecast for

Greenough MT

  • Tonight

    Tonight: Mostly clear, with a low around 29. West northwest wind around 6 mph becoming calm in the evening.

    Low: 29 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 60. Calm wind.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 68. Calm wind.

    High: 68 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. Light north wind.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 69. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 69 °F

    Slight Chance
    Rain then
    Showers
    Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 37. New precipitation amounts of less than a tenth of an inch possible.

    Low: 37 °F

    Chance Rain

  • Sunday

    Sunday: Rain likely, mainly after noon. Mostly cloudy, with a high near 54.

    High: 54 °F

    Rain Likely

  • Sunday Night

    Sunday Night: Rain likely before 3am, then a chance of rain and snow. Mostly cloudy, with a low around 32.

    Low: 32 °F

    Rain Likely
    then Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 29. West northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 60. Calm wind.
Thursday Night
Mostly clear, with a low around 28. Calm wind.
Friday
Mostly sunny, with a high near 68. Calm wind.
Friday Night
Mostly cloudy, with a low around 37. Light north wind.
Saturday
A slight chance of rain, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 69. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 37. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain likely, mainly after noon. Mostly cloudy, with a high near 54.
Sunday Night
Rain likely before 3am, then a chance of rain and snow. Mostly cloudy, with a low around 32.
Monday
Rain and snow likely before 3pm, then a chance of rain. Mostly cloudy, with a high near 49.
Monday Night
A chance of rain. Snow level 5500 feet lowering to 4700 feet after midnight . Mostly cloudy, with a low around 29.
Tuesday
A slight chance of rain and snow. Snow level 4500 feet rising to 5500 feet in the afternoon. Partly sunny, with a high near 52.
Tuesday Night
Partly cloudy, with a low around 30.
Wednesday
A chance of rain. Snow level 4700 feet rising to 5800 feet in the afternoon. Partly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Greenough MT
 46.92°N 113.45°W (Elev. 3783 ft)
Last Update:
2:00 pm MDT Apr 8, 2026
Forecast Valid:
5pm MDT Apr 8, 2026-6pm MDT Apr 15, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation