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

43°F

6°C

Humidity 68%
Wind Speed NNW 1 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Last update 29 Mar 09:15 PM MDT
Extended Forecast for

12 Miles NE Big Sky MT

  • Tonight

    Tonight: Partly cloudy, with a low around 35. North northeast wind 11 to 14 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: A chance of rain and snow between 11am and 1pm, then snow. High near 48. South southwest wind 11 to 18 mph becoming north northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    High: 48 °F

    Slight Chance
    Rain/Snow
    then
    Rain/Snow

  • Monday Night

    Monday Night: Snow, mainly before midnight. Low around 17. North northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 17 °F

    Snow then
    Chance Snow

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 43. Light and variable wind. New snow accumulation of less than a half inch possible.

    High: 43 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Snow Likely
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Snow likely before 3pm, then rain and snow likely. Partly sunny, with a high near 49. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 49 °F

    Slight Chance
    Snow then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow. Low around 33. South wind around 6 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow

  • Thursday

    Thursday: Rain and snow, becoming all snow after 3pm. Cloudy, with a high near 44. South wind 6 to 11 mph, with gusts as high as 24 mph.

    High: 44 °F

    Rain/Snow

  • Thursday Night

    Thursday Night: Snow. The snow could be heavy at times. Mostly cloudy, with a low around 21.

    Low: 21 °F

    Heavy Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 35. North northeast wind 11 to 14 mph becoming south southwest after midnight. Winds could gust as high as 22 mph.
Monday
A chance of rain and snow between 11am and 1pm, then snow. High near 48. South southwest wind 11 to 18 mph becoming north northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Monday Night
Snow, mainly before midnight. Low around 17. North northwest wind 5 to 9 mph becoming calm in the evening. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Tuesday
A 30 percent chance of snow, mainly after 4pm. Partly sunny, with a high near 43. Light and variable wind. New snow accumulation of less than a half inch possible.
Tuesday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 28. Calm wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Wednesday
Snow likely before 3pm, then rain and snow likely. Partly sunny, with a high near 49. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow. Low around 33. South wind around 6 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
Rain and snow, becoming all snow after 3pm. Cloudy, with a high near 44. South wind 6 to 11 mph, with gusts as high as 24 mph.
Thursday Night
Snow. The snow could be heavy at times. Mostly cloudy, with a low around 21.
Friday
Snow likely. Mostly cloudy, with a high near 34.
Friday Night
A chance of snow. Mostly cloudy, with a low around 19.
Saturday
A slight chance of snow. Partly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 49.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Big Sky MT
 45.39°N 111.19°W (Elev. 6998 ft)
Last Update:
9:22 pm MDT Mar 29, 2026
Forecast Valid:
9pm MDT Mar 29, 2026-6pm MDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation