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 81%
Wind Speed SSE 5 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 18 Apr 10:30 PM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 22. Southwest wind 14 to 16 mph, with gusts as high as 22 mph.

    Low: 22 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 44. Southwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 44 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 31. West southwest wind 11 to 16 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 50. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 50 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. Southwest wind 14 to 17 mph, with gusts as high as 24 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 53. South southwest wind 16 to 20 mph, with gusts as high as 33 mph.

    High: 53 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 36. South wind 14 to 17 mph, with gusts as high as 34 mph.

    Low: 36 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: Snow likely, mainly after noon. Partly sunny, with a high near 43. Breezy, with a south wind 16 to 23 mph, with gusts as high as 41 mph.

    High: 43 °F

    Snow Likely
    and Breezy

  • Wednesday Night

    Wednesday Night: Snow. The snow could be heavy at times. Cloudy, with a low around 23. Breezy.

    Low: 23 °F

    Heavy Snow
    and Breezy

Detailed Forecast

Tonight
Mostly clear, with a low around 22. Southwest wind 14 to 16 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 44. Southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Mostly cloudy, with a low around 31. West southwest wind 11 to 16 mph, with gusts as high as 21 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 50. Southwest wind 13 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 34. Southwest wind 14 to 17 mph, with gusts as high as 24 mph.
Tuesday
Mostly sunny, with a high near 53. South southwest wind 16 to 20 mph, with gusts as high as 33 mph.
Tuesday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 36. South wind 14 to 17 mph, with gusts as high as 34 mph.
Wednesday
Snow likely, mainly after noon. Partly sunny, with a high near 43. Breezy, with a south wind 16 to 23 mph, with gusts as high as 41 mph.
Wednesday Night
Snow. The snow could be heavy at times. Cloudy, with a low around 23. Breezy.
Thursday
Snow. Cloudy, with a high near 24.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 14.
Friday
A chance of snow. Partly sunny, with a high near 28.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 16.
Saturday
A chance of snow. Partly sunny, with a high near 32.
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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:
10:42 pm MDT Apr 18, 2026
Forecast Valid:
10pm MDT Apr 18, 2026-6pm MDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation