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

36°F

2°C

Humidity 90%
Wind Speed ENE 0 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 09 Oct 01:30 AM MDT
Extended Forecast for

Potomac MT

  • Overnight

    Overnight: Mostly clear, with a low around 34. Calm wind.

    Low: 34 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Light and variable wind.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34. Light east northeast wind.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77. Light and variable wind.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 39. Calm wind. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Slight Chance
    Rain then
    Chance Rain

  • Saturday

    Saturday: Rain likely. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Rain Likely

  • Saturday Night

    Saturday Night: Rain, mainly after midnight. Low around 30. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 30 °F

    Chance Rain
    then Rain

  • Sunday

    Sunday: Rain and snow, becoming all rain after 9am. Mostly cloudy, with a high near 50.

    High: 50 °F

    Rain/Snow
    then Rain
    Likely

  • Sunday Night

    Sunday Night: A chance of rain before midnight, then rain and snow likely. Snow level 5200 feet lowering to 4000 feet after midnight . Mostly cloudy, with a low around 26.

    Low: 26 °F

    Chance Rain
    then
    Rain/Snow
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 34. Calm wind.
Thursday
Sunny, with a high near 75. Light and variable wind.
Thursday Night
Mostly clear, with a low around 34. Light east northeast wind.
Friday
Sunny, with a high near 77. Light and variable wind.
Friday Night
A 50 percent chance of rain, mainly after midnight. Partly cloudy, with a low around 39. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Rain likely. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.
Saturday Night
Rain, mainly after midnight. Low around 30. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Rain and snow, becoming all rain after 9am. Mostly cloudy, with a high near 50.
Sunday Night
A chance of rain before midnight, then rain and snow likely. Snow level 5200 feet lowering to 4000 feet after midnight . Mostly cloudy, with a low around 26.
Columbus Day
A chance of rain and snow before noon, then a slight chance of rain. Snow level 3800 feet rising to 5000 feet in the afternoon. Partly sunny, with a high near 49.
Monday Night
A chance of rain and snow. Snow level 5200 feet lowering to 4300 feet after midnight . Mostly cloudy, with a low around 22.
Tuesday
A chance of rain and snow. Patchy fog. Snow level 4300 feet rising to 6400 feet in the afternoon. Otherwise, partly sunny, with a high near 52.
Tuesday Night
A chance of rain and snow. Patchy fog. Otherwise, mostly cloudy, with a low around 26.
Wednesday
A chance of rain and snow. Patchy fog. Otherwise, partly sunny, with a high near 51.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Potomac MT
 46.89°N 113.59°W (Elev. 3589 ft)
Last Update:
4:16 pm MDT Oct 8, 2025
Forecast Valid:
1am MDT Oct 9, 2025-6pm MDT Oct 15, 2025
 
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