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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

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

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

unknown precip

60°F

16°C

Humidity 53%
Wind Speed SSE 18 MPH
Barometer NA
Dewpoint 43°F (6°C)
Visibility NA
Last update 17 Sep 11:30 AM MDT
Extended Forecast for

Westby MT

  • Today

    Today: Mostly sunny, with a high near 70. Breezy, with a southeast wind 16 to 25 mph, with gusts as high as 32 mph.

    High: 70 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Breezy, with a southeast wind 19 to 24 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 40%.

    Low: 53 °F

    Mostly Cloudy
    and Breezy
    then Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms, mainly before 4pm. Mostly cloudy, with a high near 75. South wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 75 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 53. East southeast wind around 10 mph becoming north northeast after midnight. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely, mainly after noon. Cloudy, with a high near 66. East northeast wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 66 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely. Cloudy, with a low around 47. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 47 °F

    Showers
    Likely

  • Sunday

    Sunday: A 40 percent chance of showers before noon. Mostly cloudy, with a high near 67. Southeast wind around 11 mph, with gusts as high as 18 mph.

    High: 67 °F

    Chance
    Showers then
    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 46. East southeast wind 7 to 10 mph.

    Low: 46 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 71. South southeast wind 6 to 16 mph, with gusts as high as 24 mph.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 70. Breezy, with a southeast wind 16 to 25 mph, with gusts as high as 32 mph.
Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Breezy, with a southeast wind 19 to 24 mph decreasing to 13 to 18 mph after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 40%.
Friday
A 40 percent chance of showers and thunderstorms, mainly before 4pm. Mostly cloudy, with a high near 75. South wind 9 to 14 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely after 9pm. Mostly cloudy, with a low around 53. East southeast wind around 10 mph becoming north northeast after midnight. Chance of precipitation is 70%.
Saturday
Showers likely, mainly after noon. Cloudy, with a high near 66. East northeast wind 13 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Saturday Night
Showers likely. Cloudy, with a low around 47. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Sunday
A 40 percent chance of showers before noon. Mostly cloudy, with a high near 67. Southeast wind around 11 mph, with gusts as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 46. East southeast wind 7 to 10 mph.
Monday
Mostly sunny, with a high near 71. South southeast wind 6 to 16 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 49. South southeast wind around 14 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 74. South southeast wind 13 to 20 mph, with gusts as high as 29 mph.
Tuesday Night
Mostly clear, with a low around 49.
Wednesday
Sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.89°N 104.06°W (Elev. 1949 ft)
Last Update:
5:21 am MDT Sep 17, 2026
Forecast Valid:
11am MDT Sep 17, 2026-6pm MDT Sep 23, 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