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

60°F

16°C

Humidity 45%
Wind Speed SW 2 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 24 May 08:45 PM MDT
Extended Forecast for

4 Miles E Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 43. Calm wind.

    Low: 43 °F

    Mostly Clear

  • Memorial Day

    Memorial Day: Increasing clouds, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 82 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 47. Light south southeast wind.

    Low: 47 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. Light and variable wind. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after noon. High near 76. Calm wind. Chance of precipitation is 80%.

    High: 76 °F

    Partly Sunny
    then Showers

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 73 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.

    Low: 44 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 43. Calm wind.
Memorial Day
Increasing clouds, with a high near 82. Calm wind becoming south 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 47. Light south southeast wind.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 46. Light and variable wind. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm after noon. High near 76. Calm wind. Chance of precipitation is 80%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 43. Calm wind.
Thursday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 73. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 44.
Friday
A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 67.
Friday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 41.
Saturday
Rain likely and possibly a thunderstorm. Partly sunny, with a high near 63.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 41.
Sunday
A chance of rain and thunderstorms. Mostly sunny, with a high near 68.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Big Sky MT
 45.26°N 111.26°W (Elev. 5997 ft)
Last Update:
8:22 pm MDT May 24, 2026
Forecast Valid:
9pm MDT May 24, 2026-6pm MDT May 31, 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