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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

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

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

NA

60°F

16°C

Humidity 83%
Wind Speed NNE 10 MPH
Barometer NA
Dewpoint 55°F (13°C)
Visibility NA
Last update 18 Sep 08:45 PM MDT
Extended Forecast for

3 Miles WNW Westby MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 54. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 54 °F

    Mostly Cloudy

  • Saturday

    Saturday: Cloudy, with a high near 66. East northeast wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 66 °F

    Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 49. East wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of showers before noon. Mostly cloudy, with a high near 62. East wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 62 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. Southeast wind 8 to 11 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 69. South southeast wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 69 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50. South southeast wind 14 to 17 mph, with gusts as high as 25 mph.

    Low: 50 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. South southeast wind 15 to 20 mph, with gusts as high as 29 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 53. South southeast wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 54. North northeast wind 10 to 13 mph, with gusts as high as 20 mph.
Saturday
Cloudy, with a high near 66. East northeast wind 14 to 17 mph, with gusts as high as 26 mph.
Saturday Night
Mostly cloudy, with a low around 49. East wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
A 20 percent chance of showers before noon. Mostly cloudy, with a high near 62. East wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday Night
Partly cloudy, with a low around 48. Southeast wind 8 to 11 mph.
Monday
Mostly sunny, with a high near 69. South southeast wind 8 to 18 mph, with gusts as high as 28 mph.
Monday Night
Partly cloudy, with a low around 50. South southeast wind 14 to 17 mph, with gusts as high as 25 mph.
Tuesday
Mostly sunny, with a high near 72. South southeast wind 15 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
Partly cloudy, with a low around 53. South southeast wind 10 to 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 76. South wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 53. South southeast wind 7 to 9 mph.
Thursday
Sunny, with a high near 77.
Thursday Night
Mostly clear, with a low around 54.
Friday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Westby MT
 48.89°N 104.12°W (Elev. 2165 ft)
Last Update:
3:56 pm MDT Sep 18, 2026
Forecast Valid:
9pm MDT Sep 18, 2026-6pm MDT Sep 25, 2026
 
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Additional Resources

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