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

69°F

21°C

Humidity 45%
Wind Speed NNW 8 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 19 Jun 06:30 PM MDT
Extended Forecast for

11 Miles E Big Sky MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. East wind 6 to 9 mph becoming south after midnight.

    Low: 43 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 55. South southwest wind 7 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 55 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then a slight chance of showers between midnight and 2am. Low around 40. West wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 40 °F

    Showers then
    Slight Chance
    Showers

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 55. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    High: 55 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 36. West northwest wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 36 °F

    Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 51. West northwest wind 5 to 14 mph, with gusts as high as 22 mph.

    High: 51 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. North northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 60. South wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 60 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 43. East wind 6 to 9 mph becoming south after midnight.
Saturday
Showers and possibly a thunderstorm. High near 55. South southwest wind 7 to 10 mph becoming west in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and possibly a thunderstorm before midnight, then a slight chance of showers between midnight and 2am. Low around 40. West wind around 8 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 55. West northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Sunday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 36. West northwest wind 6 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Monday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 51. West northwest wind 5 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 33. North northwest wind 9 to 14 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Tuesday
Sunny, with a high near 60. South wind 5 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Mostly clear, with a low around 40.
Wednesday
Mostly sunny, with a high near 63.
Wednesday Night
Partly cloudy, with a low around 42.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 63.
Thursday Night
Partly cloudy, with a low around 43.
Friday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
11 Miles E Big Sky MT
 45.27°N 111.11°W (Elev. 9341 ft)
Last Update:
4:52 pm MDT Jun 19, 2026
Forecast Valid:
7pm MDT Jun 19, 2026-6pm MDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation