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

Late January Extreme Cold; Watching for Another East Coast Storm Threat This Weekend

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

35°F

2°C

Humidity 50%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 27 Jan 11:00 AM MST
Extended Forecast for

Greenough MT

  • Today

    Today: Mostly sunny, with a high near 36. Calm wind.

    High: 36 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 16. Calm wind.

    Low: 16 °F

    Patchy Fog

  • Wednesday

    Wednesday: A 20 percent chance of snow before 11am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 36. Calm wind.

    High: 36 °F

    Slight Chance
    Snow and
    Patchy Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 39. Calm wind.

    High: 39 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: A slight chance of snow and freezing rain before 2am, then a slight chance of freezing rain after 5am. Patchy fog after 8pm. Snow level 4500 feet. Otherwise, mostly cloudy, with a low around 25. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Wintry Mix
    and Patchy
    Fog

  • Friday

    Friday: A slight chance of snow and freezing rain before 8am, then a slight chance of rain and snow between 8am and 11am, then a slight chance of rain after 11am. Areas of fog before 11am. Snow level 4300 feet rising to 5400 feet in the afternoon. Otherwise, mostly cloudy, with a high near 41. Chance of precipitation is 20%.

    High: 41 °F

    Slight Chance
    Wintry Mix
    and Areas Fog

  • Friday Night

    Friday Night: A slight chance of rain before 8pm, then a slight chance of rain or freezing rain. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 29.

    Low: 29 °F

    Slight Chance
    Rain/Freezing
    Rain and
    Patchy Fog

  • Saturday

    Saturday: A slight chance of rain or freezing rain before 8am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 45.

    High: 45 °F

    Slight Chance
    Rain/Freezing
    Rain and
    Patchy Fog

Detailed Forecast

Today
Mostly sunny, with a high near 36. Calm wind.
Tonight
Patchy fog before 3am, then patchy fog after 4am. Otherwise, mostly cloudy, with a low around 16. Calm wind.
Wednesday
A 20 percent chance of snow before 11am. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 36. Calm wind.
Wednesday Night
Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 22. Calm wind.
Thursday
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 39. Calm wind.
Thursday Night
A slight chance of snow and freezing rain before 2am, then a slight chance of freezing rain after 5am. Patchy fog after 8pm. Snow level 4500 feet. Otherwise, mostly cloudy, with a low around 25. Chance of precipitation is 20%.
Friday
A slight chance of snow and freezing rain before 8am, then a slight chance of rain and snow between 8am and 11am, then a slight chance of rain after 11am. Areas of fog before 11am. Snow level 4300 feet rising to 5400 feet in the afternoon. Otherwise, mostly cloudy, with a high near 41. Chance of precipitation is 20%.
Friday Night
A slight chance of rain before 8pm, then a slight chance of rain or freezing rain. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 29.
Saturday
A slight chance of rain or freezing rain before 8am. Patchy fog before 10am. Otherwise, partly sunny, with a high near 45.
Saturday Night
Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 23.
Sunday
Patchy fog. Otherwise, partly sunny, with a high near 44.
Sunday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 24.
Monday
A slight chance of rain and snow. Patchy fog. Snow level 4600 feet. Otherwise, partly sunny, with a high near 42.
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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:
3:58 am MST Jan 27, 2026
Forecast Valid:
11am MST Jan 27, 2026-6pm MST Feb 2, 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