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

Karst US-191 MP 55.3 (MTKAR)

Lat: 45.34534°NLon: 111.17261°WElev: 5699.0ft.

unknown precip

68°F

20°C

Humidity 66%
Wind Speed NW 2 MPH
Barometer NA
Dewpoint 56°F (13°C)
Visibility NA
Last update 07 Jul 08:45 PM MDT
Extended Forecast for

4 Miles ENE Big Sky MT

  • Tonight

    Tonight: Partly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 82. Calm wind becoming west southwest around 5 mph.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82. Calm wind becoming west around 6 mph in the afternoon.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54. West southwest wind around 5 mph becoming calm in the evening.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 90. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 50. Calm wind.
Wednesday
Sunny, with a high near 82. Calm wind becoming west southwest around 5 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 11pm. Mostly cloudy, with a low around 50. Calm wind.
Thursday
Sunny, with a high near 82. Calm wind becoming west around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 50. Light and variable wind.
Friday
Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 54. West southwest wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 90. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 92.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles ENE Big Sky MT
 45.28°N 111.26°W (Elev. 6663 ft)
Last Update:
8:06 pm MDT Jul 7, 2026
Forecast Valid:
9pm MDT Jul 7, 2026-6pm MDT Jul 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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