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

37°F

3°C

Humidity 89%
Wind Speed SW 0 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Last update 11 Apr 03:00 AM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Overnight

    Overnight: Partly cloudy, with a low around 35. South wind 18 to 21 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain and snow between 1pm and 4pm, then a chance of snow after 4pm. Partly sunny, with a high near 46. Windy, with a south wind 22 to 30 mph, with gusts as high as 46 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 46 °F

    Partly Sunny
    and Breezy
    then Chance
    Rain/Snow and
    Windy

  • Saturday Night

    Saturday Night: A chance of snow showers between 7pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 29. Breezy, with a west southwest wind 14 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Chance Snow
    Showers and
    Breezy then
    Partly Cloudy

  • Sunday

    Sunday: Snow showers, mainly after noon. Some thunder is also possible. High near 41. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Slight Chance
    Snow Showers
    then Snow
    Showers

  • Sunday Night

    Sunday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South southwest wind 17 to 20 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance Snow
    then Slight
    Chance Snow

  • Monday

    Monday: Snow, mainly after noon. High near 34. South southwest wind 18 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Chance Snow
    then Snow

  • Monday Night

    Monday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 25. West southwest wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Snow Likely
    then Chance
    Snow

  • Tuesday

    Tuesday: A chance of snow. Partly sunny, with a high near 35. Southwest wind 13 to 21 mph, with gusts as high as 33 mph.

    High: 35 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: A slight chance of snow after midnight. Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy
    then Slight
    Chance Snow

Detailed Forecast

Overnight
Partly cloudy, with a low around 35. South wind 18 to 21 mph, with gusts as high as 25 mph.
Saturday
A chance of rain and snow between 1pm and 4pm, then a chance of snow after 4pm. Partly sunny, with a high near 46. Windy, with a south wind 22 to 30 mph, with gusts as high as 46 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Saturday Night
A chance of snow showers between 7pm and midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 29. Breezy, with a west southwest wind 14 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Sunday
Snow showers, mainly after noon. Some thunder is also possible. High near 41. South southwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Sunday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 27. South southwest wind 17 to 20 mph, with gusts as high as 31 mph. New snow accumulation of less than a half inch possible.
Monday
Snow, mainly after noon. High near 34. South southwest wind 18 to 21 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Monday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 25. West southwest wind 11 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Tuesday
A chance of snow. Partly sunny, with a high near 35. Southwest wind 13 to 21 mph, with gusts as high as 33 mph.
Tuesday Night
A slight chance of snow after midnight. Partly cloudy, with a low around 25.
Wednesday
Snow likely, mainly after noon. Mostly cloudy, with a high near 34. Breezy.
Wednesday Night
Snow. Cloudy, with a low around 21. Breezy.
Thursday
Snow. Cloudy, with a high near 24.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 12.
Friday
A chance of snow. Partly sunny, with a high near 25.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
15 Miles ENE Big Sky MT
 45.32°N 111.05°W (Elev. 8901 ft)
Last Update:
12:32 am MDT Apr 11, 2026
Forecast Valid:
3am MDT Apr 11, 2026-6pm MDT Apr 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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