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

32°F

0°C

Humidity 89%
Wind Speed W 2 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 30 Mar 04:15 AM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Today

    Today: Snow, mainly after 3pm. The snow could be heavy at times. High near 39. Windy, with a southwest wind 23 to 33 mph becoming west northwest in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 39 °F

    Windy. Mostly
    Sunny then
    Heavy Snow

  • Tonight

    Tonight: Snow, mainly before 10pm. The snow could be heavy at times. Low around 15. West northwest wind 16 to 21 mph becoming northwest 9 to 14 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 15 °F

    Heavy Snow
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: Snow likely, mainly after noon. Mostly cloudy, with a high near 33. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 33 °F

    Chance Snow
    then Snow
    Likely

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 26. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    Low: 26 °F

    Snow Likely
    then Chance
    Snow

  • Wednesday

    Wednesday: Snow, mainly after noon. High near 35. Southwest wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 35 °F

    Chance Snow
    then Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 27. South wind 16 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 27 °F

    Snow

  • Thursday

    Thursday: Snow. The snow could be heavy at times. High near 30. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    High: 30 °F

    Heavy Snow
    and Breezy

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times. Mostly cloudy, with a low around 18. West northwest wind 14 to 20 mph, with gusts as high as 36 mph.

    Low: 18 °F

    Heavy Snow

  • Friday

    Friday: Snow likely, mainly before noon. Mostly cloudy, with a high near 26.

    High: 26 °F

    Snow Likely

Detailed Forecast

Today
Snow, mainly after 3pm. The snow could be heavy at times. High near 39. Windy, with a southwest wind 23 to 33 mph becoming west northwest in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Snow, mainly before 10pm. The snow could be heavy at times. Low around 15. West northwest wind 16 to 21 mph becoming northwest 9 to 14 mph after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Snow likely, mainly after noon. Mostly cloudy, with a high near 33. South wind 9 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Tuesday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 26. South southwest wind 9 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Wednesday
Snow, mainly after noon. High near 35. Southwest wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Wednesday Night
Snow. Low around 27. South wind 16 to 20 mph, with gusts as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow. The snow could be heavy at times. High near 30. Breezy, with a south wind 20 to 23 mph, with gusts as high as 38 mph. Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.
Thursday Night
Snow. The snow could be heavy at times. Mostly cloudy, with a low around 18. West northwest wind 14 to 20 mph, with gusts as high as 36 mph.
Friday
Snow likely, mainly before noon. Mostly cloudy, with a high near 26.
Friday Night
A chance of snow, mainly before midnight. Partly cloudy, with a low around 18.
Saturday
Sunny, with a high near 36.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Mostly sunny, with a high near 41.
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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:
3:46 am MDT Mar 30, 2026
Forecast Valid:
4am MDT Mar 30, 2026-6pm MDT Apr 5, 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