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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Bearmouth I-90 MP 145.8 (MTBRM)

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

NA

78°F

26°C

Humidity 27%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Heat Index78°F (26°C)
Last update 03 Oct 04:15 PM MDT
Extended Forecast for

Potomac MT

  • Tonight

    Tonight: Mostly clear, with a low around 33. Calm wind.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 81. Calm wind.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. West wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 33. Calm wind.
Sunday
Sunny, with a high near 81. Calm wind.
Sunday Night
Partly cloudy, with a low around 36. Calm wind.
Monday
Sunny, with a high near 80. Calm wind becoming west around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 38. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 77.
Tuesday Night
Mostly clear, with a low around 39.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 39.
Thursday
Sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 39.
Friday
Sunny, with a high near 77.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
Saturday
A chance of rain. Partly sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Potomac MT
 46.87°N 113.56°W (Elev. 3717 ft)
Last Update:
2:01 pm MDT Oct 3, 2026
Forecast Valid:
4pm MDT Oct 3, 2026-6pm MDT Oct 10, 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