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

44°F

7°C

Humidity 53%
Wind Speed ESE 4 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill42°F (6°C)
Last update 13 Mar 04:15 AM MDT
Extended Forecast for

6 Miles ESE Big Sky MT

  • Overnight

    Overnight: A 40 percent chance of snow. Mostly cloudy, with a low around 32. Southwest wind around 10 mph, with gusts as high as 26 mph. Total nighttime snow accumulation of less than a half inch possible.

    Low: 32 °F

    Chance Snow

  • Friday

    Friday: A chance of snow before 2pm, then rain and snow likely. Mostly cloudy, with a high near 44. Southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Chance Snow
    then
    Rain/Snow
    Likely

  • Friday Night

    Friday Night: A chance of rain and snow before 8pm, then snow likely. Cloudy, with a low around 34. West southwest wind 7 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 34 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Saturday

    Saturday: Snow. High near 39. Southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    High: 39 °F

    Snow

  • Saturday Night

    Saturday Night: Snow, mainly before midnight. Low around 9. West northwest wind 12 to 17 mph becoming light northwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 9 °F

    Snow then
    Chance Snow

  • Sunday

    Sunday: A 30 percent chance of snow, mainly before noon. Partly sunny, with a high near 27. Calm wind becoming west 5 to 7 mph in the afternoon. Little or no snow accumulation expected.

    High: 27 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 19. West wind around 6 mph becoming calm. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow

  • Monday

    Monday: Snow likely before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 42. Southwest wind 5 to 10 mph, with gusts as high as 22 mph.

    High: 42 °F

    Snow Likely
    then Chance
    Rain/Snow

  • Monday Night

    Monday Night: A chance of rain and snow before 3am, then a slight chance of rain. Cloudy, with a low around 36.

    Low: 36 °F

    Chance
    Rain/Snow

Detailed Forecast

Overnight
A 40 percent chance of snow. Mostly cloudy, with a low around 32. Southwest wind around 10 mph, with gusts as high as 26 mph. Total nighttime snow accumulation of less than a half inch possible.
Friday
A chance of snow before 2pm, then rain and snow likely. Mostly cloudy, with a high near 44. Southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of rain and snow before 8pm, then snow likely. Cloudy, with a low around 34. West southwest wind 7 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Saturday
Snow. High near 39. Southwest wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Saturday Night
Snow, mainly before midnight. Low around 9. West northwest wind 12 to 17 mph becoming light northwest after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Sunday
A 30 percent chance of snow, mainly before noon. Partly sunny, with a high near 27. Calm wind becoming west 5 to 7 mph in the afternoon. Little or no snow accumulation expected.
Sunday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 19. West wind around 6 mph becoming calm. New snow accumulation of less than a half inch possible.
Monday
Snow likely before 3pm, then a chance of rain and snow. Mostly cloudy, with a high near 42. Southwest wind 5 to 10 mph, with gusts as high as 22 mph.
Monday Night
A chance of rain and snow before 3am, then a slight chance of rain. Cloudy, with a low around 36.
Tuesday
Mostly cloudy, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Partly sunny, with a high near 57.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 60.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Big Sky MT
 45.24°N 111.22°W (Elev. 7129 ft)
Last Update:
3:51 am MDT Mar 13, 2026
Forecast Valid:
5am MDT Mar 13, 2026-6pm MDT Mar 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation