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

Sky Warn 2026

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Current conditions at

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

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

NA

41°F

5°C

Humidity 75%
Wind Speed SE 5 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 19 May 11:45 PM MDT
Extended Forecast for

Westby MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. South southeast wind 13 to 15 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 69. South southwest wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 69 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, with a low around 40. West wind 6 to 8 mph becoming north northwest in the evening. Chance of precipitation is 20%.

    Low: 40 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 63. North wind 7 to 9 mph. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 40. Northeast wind 5 to 10 mph becoming west southwest after midnight.

    Low: 40 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after noon. Partly sunny, with a high near 67. West northwest wind 6 to 9 mph becoming southwest in the afternoon.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 41. North wind 6 to 9 mph becoming south after midnight.

    Low: 41 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74. Southwest wind 5 to 11 mph.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 47. Southeast wind around 10 mph.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. South southeast wind 13 to 15 mph, with gusts as high as 25 mph.
Wednesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 69. South southwest wind 11 to 14 mph, with gusts as high as 20 mph.
Wednesday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, with a low around 40. West wind 6 to 8 mph becoming north northwest in the evening. Chance of precipitation is 20%.
Thursday
A chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 63. North wind 7 to 9 mph. Chance of precipitation is 40%.
Thursday Night
A 40 percent chance of showers, mainly before midnight. Mostly cloudy, with a low around 40. Northeast wind 5 to 10 mph becoming west southwest after midnight.
Friday
A 20 percent chance of showers after noon. Partly sunny, with a high near 67. West northwest wind 6 to 9 mph becoming southwest in the afternoon.
Friday Night
Partly cloudy, with a low around 41. North wind 6 to 9 mph becoming south after midnight.
Saturday
Mostly sunny, with a high near 74. Southwest wind 5 to 11 mph.
Saturday Night
Partly cloudy, with a low around 47. Southeast wind around 10 mph.
Sunday
Mostly sunny, with a high near 81. South southeast wind 10 to 20 mph, with gusts as high as 28 mph.
Sunday Night
Partly cloudy, with a low around 49. South southeast wind 8 to 16 mph, with gusts as high as 24 mph.
Memorial Day
Mostly sunny, with a high near 85. Breezy.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 82. Windy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Westby MT
 48.87°N 104.05°W (Elev. 1991 ft)
Last Update:
5:16 pm MDT May 19, 2026
Forecast Valid:
12am MDT May 20, 2026-6pm MDT May 26, 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