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

30°F

-1°C

Humidity 82%
Wind Speed S 0 MPH
Barometer NA
Dewpoint 25°F (-4°C)
Visibility NA
Last update 10 Apr 12:15 AM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Overnight

    Overnight: Partly cloudy, with a low around 28. South wind 8 to 10 mph.

    Low: 28 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain after 3pm, mixing with snow after 5pm. Partly sunny, with a high near 49. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.

    High: 49 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: A 30 percent chance of rain, mainly before 7pm. Partly cloudy, with a low around 36. South southeast wind 13 to 20 mph, with gusts as high as 28 mph.

    Low: 36 °F

    Chance Rain
    then Partly
    Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 46. Breezy, with a south wind 21 to 28 mph, with gusts as high as 46 mph. Little or no snow accumulation expected.

    High: 46 °F

    Breezy.
    Mostly Sunny
    then Chance
    Snow Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 31. Breezy, with a south southwest wind 16 to 25 mph, with gusts as high as 39 mph. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance Snow
    Showers and
    Breezy

  • Sunday

    Sunday: Snow, mainly between noon and 3pm, then snow showers after 3pm. Some thunder is also possible. High near 42. South southwest wind 16 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Slight Chance
    Snow then
    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 29. South southwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 29 °F

    Snow Likely
    then Chance
    Snow

  • Monday

    Monday: Snow likely before noon, then snow showers after noon. Some thunder is also possible. Mostly cloudy, with a high near 34. South southwest wind 17 to 20 mph, with gusts as high as 32 mph.

    High: 34 °F

    Snow Showers

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Snow Likely

Detailed Forecast

Overnight
Partly cloudy, with a low around 28. South wind 8 to 10 mph.
Friday
A slight chance of rain after 3pm, mixing with snow after 5pm. Partly sunny, with a high near 49. South wind 9 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 20%.
Friday Night
A 30 percent chance of rain, mainly before 7pm. Partly cloudy, with a low around 36. South southeast wind 13 to 20 mph, with gusts as high as 28 mph.
Saturday
A 50 percent chance of snow showers after noon. Some thunder is also possible. Partly sunny, with a high near 46. Breezy, with a south wind 21 to 28 mph, with gusts as high as 46 mph. Little or no snow accumulation expected.
Saturday Night
A 50 percent chance of snow showers, mainly before midnight. Mostly cloudy, with a low around 31. Breezy, with a south southwest wind 16 to 25 mph, with gusts as high as 39 mph. New snow accumulation of less than a half inch possible.
Sunday
Snow, mainly between noon and 3pm, then snow showers after 3pm. Some thunder is also possible. High near 42. South southwest wind 16 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 29. South southwest wind 17 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
Snow likely before noon, then snow showers after noon. Some thunder is also possible. Mostly cloudy, with a high near 34. South southwest wind 17 to 20 mph, with gusts as high as 32 mph.
Monday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 26.
Tuesday
A chance of snow. Mostly cloudy, with a high near 36.
Tuesday Night
A slight chance of snow. Mostly cloudy, with a low around 26.
Wednesday
Snow likely. Mostly cloudy, with a high near 33. Breezy.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 20.
Thursday
A chance of snow. Partly sunny, with a high near 29.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ENE Big Sky MT
 45.32°N 111.05°W (Elev. 8901 ft)
Last Update:
12:31 am MDT Apr 10, 2026
Forecast Valid:
12am MDT Apr 10, 2026-6pm MDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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