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 47%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 03 Jul 11:00 AM MDT
Extended Forecast for

13 Miles ENE Big Sky MT

  • Today

    Today: A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 60. West wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 60 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 45. West wind 5 to 9 mph becoming light and variable. Winds could gust as high as 18 mph.

    Low: 45 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Independence Day

    Independence Day: Sunny, with a high near 67. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 67 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. South southwest wind 6 to 10 mph, with gusts as high as 21 mph.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 69. South southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 69 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. Light and variable wind becoming west 5 to 8 mph in the afternoon.

    High: 68 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South southeast wind 5 to 7 mph becoming north in the evening.

    Low: 52 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 67.

    High: 67 °F

    Partly Sunny
    then Showers
    Likely

Detailed Forecast

Today
A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 60. West wind 7 to 11 mph, with gusts as high as 20 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly clear, with a low around 45. West wind 5 to 9 mph becoming light and variable. Winds could gust as high as 18 mph.
Independence Day
Sunny, with a high near 67. West southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Saturday Night
Mostly clear, with a low around 51. South southwest wind 6 to 10 mph, with gusts as high as 21 mph.
Sunday
A 20 percent chance of showers and thunderstorms after noon. Sunny, with a high near 69. South southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Sunday Night
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 51. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Monday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 68. Light and variable wind becoming west 5 to 8 mph in the afternoon.
Monday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52. South southeast wind 5 to 7 mph becoming north in the evening.
Tuesday
Showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 67.
Tuesday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 52.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 68.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 52.
Thursday
Sunny, with a high near 66.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
13 Miles ENE Big Sky MT
 45.34°N 111.09°W (Elev. 8730 ft)
Last Update:
5:26 am MDT Jul 3, 2026
Forecast Valid:
11am MDT Jul 3, 2026-6pm MDT Jul 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation