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

39°F

4°C

Humidity 90%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill35°F (2°C)
Last update 12 Apr 01:45 AM MDT
Extended Forecast for

6 Miles ESE Big Sky MT

  • Overnight

    Overnight: Partly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 51. Light southeast wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%.

    High: 51 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of rain and snow before 4am, then a slight chance of snow after 5am. Partly cloudy, with a low around 31. South wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Monday

    Monday: Snow likely, mainly after noon. Mostly cloudy, with a high near 44. Southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 44 °F

    Chance Snow
    then Snow
    Likely

  • Monday Night

    Monday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 30. West southwest wind 5 to 7 mph becoming calm in the evening. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Chance Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Mostly sunny, with a high near 47. Light south southwest wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 47 °F

    Mostly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32. South southwest wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 32 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Snow, mainly after noon. Mostly cloudy, with a high near 44. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 44 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow. Cloudy, with a low around 25.

    Low: 25 °F

    Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 34. Calm wind.
Sunday
A chance of showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 5pm, then a chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 51. Light southeast wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%.
Sunday Night
A chance of rain and snow before 4am, then a slight chance of snow after 5am. Partly cloudy, with a low around 31. South wind 6 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Monday
Snow likely, mainly after noon. Mostly cloudy, with a high near 44. Southwest wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Monday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 30. West southwest wind 5 to 7 mph becoming calm in the evening. New snow accumulation of less than a half inch possible.
Tuesday
A 20 percent chance of snow after noon. Mostly sunny, with a high near 47. Light south southwest wind becoming southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 32. South southwest wind 6 to 10 mph, with gusts as high as 22 mph.
Wednesday
Snow, mainly after noon. Mostly cloudy, with a high near 44. South wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 32 mph.
Wednesday Night
Snow. Cloudy, with a low around 25.
Thursday
Snow. Cloudy, with a high near 32.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 18.
Friday
A chance of snow. Partly sunny, with a high near 35.
Friday Night
Partly cloudy, with a low around 17.
Saturday
A slight chance of snow. Mostly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Big Sky MT
 45.24°N 111.22°W (Elev. 7129 ft)
Last Update:
12:32 am MDT Apr 12, 2026
Forecast Valid:
2am MDT Apr 12, 2026-6pm MDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation