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

73°F

23°C

Humidity 26%
Wind Speed NW 4 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Last update 26 May 03:15 PM MDT
Extended Forecast for

6 Miles ENE Big Sky MT

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm. High near 71. East southeast wind 3 to 6 mph. Chance of precipitation is 90%.

    High: 71 °F

    Showers

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 46. Calm wind. Chance of precipitation is 70%.

    Low: 46 °F

    Showers
    Likely then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 76. Calm wind becoming east around 5 mph. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 48. Calm wind.

    Low: 48 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. Calm wind becoming south southeast around 6 mph in the afternoon.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. Light southeast wind.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78. Calm wind becoming south around 6 mph in the afternoon.

    High: 78 °F

    Sunny then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 44. South southwest wind around 5 mph becoming calm in the evening.

    Low: 44 °F

    Chance
    Showers

  • Saturday

    Saturday: Rain likely, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 62.

    High: 62 °F

    Showers

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 71. East southeast wind 3 to 6 mph. Chance of precipitation is 90%.
Tonight
Showers and thunderstorms likely, mainly before 9pm. Cloudy, then gradually becoming partly cloudy, with a low around 46. Calm wind. Chance of precipitation is 70%.
Wednesday
A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 76. Calm wind becoming east around 5 mph. Chance of precipitation is 40%.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Partly cloudy, with a low around 48. Calm wind.
Thursday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82. Calm wind becoming south southeast around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 50. Light southeast wind.
Friday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 78. Calm wind becoming south around 6 mph in the afternoon.
Friday Night
A chance of showers and thunderstorms before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 44. South southwest wind around 5 mph becoming calm in the evening.
Saturday
Rain likely, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 62.
Saturday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 39.
Sunday
Rain and possibly a thunderstorm. Mostly cloudy, with a high near 61.
Sunday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 37.
Monday
A chance of rain and thunderstorms. Partly sunny, with a high near 66.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 38.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 71.
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ENE Big Sky MT
 45.31°N 111.2°W (Elev. 6234 ft)
Last Update:
3:07 pm MDT May 26, 2026
Forecast Valid:
3pm MDT May 26, 2026-6pm MDT Jun 2, 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