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

38°F

3°C

Humidity 91%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 36°F (2°C)
Visibility NA
Wind Chill34°F (1°C)
Last update 12 Apr 02:30 AM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Overnight

    Overnight: Partly cloudy, with a low around 28. South southwest wind around 14 mph, with gusts as high as 18 mph.

    Low: 28 °F

    Partly Cloudy

  • Sunday

    Sunday: Snow showers likely, mainly after 4pm. Some thunder is also possible. Partly sunny, with a high near 41. South wind 13 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Partly Sunny
    then Snow
    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of snow before 2am, then a slight chance of snow after 3am. Partly cloudy, with a low around 24. South southwest wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Chance Snow

  • Monday

    Monday: Snow likely, mainly after noon. Mostly cloudy, with a high near 33. Breezy, with a west southwest wind 20 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 33 °F

    Chance Snow
    then Snow
    Likely and
    Breezy

  • Monday Night

    Monday Night: A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 25. West southwest wind 11 to 17 mph, with gusts as high as 28 mph. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Chance Snow
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Mostly sunny, with a high near 37. Southwest wind 11 to 21 mph, with gusts as high as 33 mph.

    High: 37 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 28. Breezy, with a south southwest wind 20 to 23 mph, with gusts as high as 34 mph.

    Low: 28 °F

    Mostly Cloudy
    and Breezy

  • Wednesday

    Wednesday: Snow, mainly after noon. Mostly cloudy, with a high near 34. Breezy, with a south southwest wind 24 to 28 mph, with gusts as high as 45 mph.

    High: 34 °F

    Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times. Cloudy, with a low around 20. Breezy.

    Low: 20 °F

    Heavy Snow
    and Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 28. South southwest wind around 14 mph, with gusts as high as 18 mph.
Sunday
Snow showers likely, mainly after 4pm. Some thunder is also possible. Partly sunny, with a high near 41. South wind 13 to 18 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
A chance of snow before 2am, then a slight chance of snow after 3am. Partly cloudy, with a low around 24. South southwest wind 18 to 21 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
Monday
Snow likely, mainly after noon. Mostly cloudy, with a high near 33. Breezy, with a west southwest wind 20 to 22 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Monday Night
A 40 percent chance of snow before midnight. Mostly cloudy, with a low around 25. West southwest wind 11 to 17 mph, with gusts as high as 28 mph. 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 37. Southwest wind 11 to 21 mph, with gusts as high as 33 mph.
Tuesday Night
Mostly cloudy, with a low around 28. Breezy, with a south southwest wind 20 to 23 mph, with gusts as high as 34 mph.
Wednesday
Snow, mainly after noon. Mostly cloudy, with a high near 34. Breezy, with a south southwest wind 24 to 28 mph, with gusts as high as 45 mph.
Wednesday Night
Snow. The snow could be heavy at times. Cloudy, with a low around 20. Breezy.
Thursday
Snow. The snow could be heavy at times. Cloudy, with a high near 22.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 13.
Friday
A chance of snow. Partly sunny, with a high near 24.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 13.
Saturday
A slight chance of snow. Mostly sunny, with a high near 32.
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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:
12:32 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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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