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

The Work Week will Begin with Unsettled Weather from the Southern Plains to the Great Lakes

Unsettled weather is forecast to continue through the first half of the work week from the Southern Plains to the Great Lakes as a frontal system moves through. Isolated to scattered severe thunderstorms and flash flooding will be possible each day. Meanwhile, scattered showers and thunderstorms are expected across the Southwest and California, with isolated flash flooding possible. Read More >

Current conditions at

Comertown Turn-Off MT-5 MP 13.4 (MTCOM)

Lat: 48.81°NLon: 104.2529°WElev: 2359.0ft.

NA

58°F

14°C

Humidity 63%
Wind Speed SSW 7 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 22 Sep 12:00 AM MDT
Extended Forecast for

Westby MT

  • Overnight

    Overnight: Areas of smoke after 2am. Mostly clear, with a low around 50. South wind 8 to 10 mph becoming northwest.

    Low: 50 °F

    Areas Smoke

  • Monday

    Monday: Areas of smoke before 9am. Mostly sunny, with a high near 74. Northwest wind 11 to 21 mph, with gusts as high as 30 mph.

    High: 74 °F

    Areas Smoke
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 47. Northwest wind 8 to 16 mph, with gusts as high as 25 mph.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 74. Northwest wind 6 to 8 mph.

    High: 74 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46. South wind 3 to 6 mph.

    Low: 46 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. South wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 75. North northwest wind 10 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. East southeast wind around 9 mph.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Areas of smoke after 2am. Mostly clear, with a low around 50. South wind 8 to 10 mph becoming northwest.
Monday
Areas of smoke before 9am. Mostly sunny, with a high near 74. Northwest wind 11 to 21 mph, with gusts as high as 30 mph.
Monday Night
Partly cloudy, with a low around 47. Northwest wind 8 to 16 mph, with gusts as high as 25 mph.
Tuesday
Sunny, with a high near 74. Northwest wind 6 to 8 mph.
Tuesday Night
Mostly clear, with a low around 46. South wind 3 to 6 mph.
Wednesday
Sunny, with a high near 81. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 26 mph.
Wednesday Night
Mostly clear, with a low around 49. South wind 10 to 14 mph, with gusts as high as 21 mph.
Thursday
Sunny, with a high near 75. North northwest wind 10 to 13 mph becoming east northeast in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 49. East southeast wind around 9 mph.
Friday
Sunny, with a high near 79. South wind 10 to 16 mph becoming west in the afternoon. Winds could gust as high as 24 mph.
Friday Night
Partly cloudy, with a low around 48. North northwest wind around 11 mph becoming west after midnight. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.87°N 104.05°W (Elev. 1991 ft)
Last Update:
2:51 pm MDT Sep 21, 2025
Forecast Valid:
12am MDT Sep 22, 2025-6pm MDT Sep 28, 2025
 
Forecast Discussion
 
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Additional Resources

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