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 82%
Wind Speed S 2 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 29 Mar 11:30 PM MDT
Extended Forecast for

6 Miles ESE Big Sky MT

  • Tonight

    Tonight: Partly cloudy, with a low around 37. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Partly Cloudy

  • Monday

    Monday: A chance of rain and snow between 11am and 3pm, then snow likely. Increasing clouds, with a high near 46. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 46 °F

    Slight Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Monday Night

    Monday Night: Snow, mainly before midnight. Low around 18. North northwest wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 18 °F

    Snow then
    Chance Snow

  • Tuesday

    Tuesday: A slight chance of snow before 9am, then a chance of snow after noon. Partly sunny, with a high near 42. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 42 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 31. Light south wind. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 31 °F

    Snow Likely
    then Slight
    Chance Snow

  • Wednesday

    Wednesday: Snow likely before 3pm, then rain and snow likely. Mostly cloudy, with a high near 46. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 46 °F

    Slight Chance
    Snow then
    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: Rain and snow, becoming all snow after 3am. Low around 33. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Rain/Snow

  • Thursday

    Thursday: Snow. Cloudy, with a high near 41. South wind 6 to 13 mph, with gusts as high as 24 mph.

    High: 41 °F

    Snow

  • Thursday Night

    Thursday Night: Snow. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. South southwest wind 10 to 13 mph, with gusts as high as 23 mph.
Monday
A chance of rain and snow between 11am and 3pm, then snow likely. Increasing clouds, with a high near 46. Southwest wind 13 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday Night
Snow, mainly before midnight. Low around 18. North northwest wind 5 to 10 mph becoming light and variable in the evening. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Tuesday
A slight chance of snow before 9am, then a chance of snow after noon. Partly sunny, with a high near 42. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Tuesday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 31. Light south 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. Mostly cloudy, with a high near 46. Calm wind becoming south southwest 5 to 8 mph in the afternoon. Chance of precipitation is 60%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow, becoming all snow after 3am. Low around 33. South wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Thursday
Snow. Cloudy, with a high near 41. South wind 6 to 13 mph, with gusts as high as 24 mph.
Thursday Night
Snow. Mostly cloudy, with a low around 22.
Friday
Snow likely. Mostly cloudy, with a high near 31.
Friday Night
A chance of snow. Mostly cloudy, with a low around 20.
Saturday
A slight chance of snow. Partly sunny, with a high near 40.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ESE Big Sky MT
 45.24°N 111.22°W (Elev. 7129 ft)
Last Update:
9:22 pm MDT Mar 29, 2026
Forecast Valid:
11pm MDT Mar 29, 2026-6pm MDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation