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

14°F

-10°C

Humidity 92%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Last update 18 Apr 05:30 AM MDT
Extended Forecast for

15 Miles ENE Big Sky MT

  • Today

    Today: Sunny, with a high near 34. Wind chill values as low as -5. West southwest wind 14 to 16 mph, with gusts as high as 26 mph.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 20. Southwest wind around 17 mph, with gusts as high as 24 mph.

    Low: 20 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 43. Southwest wind 13 to 15 mph, with gusts as high as 21 mph.

    High: 43 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 29. Southwest wind 13 to 16 mph, with gusts as high as 22 mph.

    Low: 29 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 50. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 50 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 33. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 53. South wind 16 to 20 mph, with gusts as high as 32 mph.

    High: 53 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35. South wind 13 to 15 mph, with gusts as high as 30 mph.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Rain and snow likely, becoming all snow after 3pm. Partly sunny, with a high near 44.

    High: 44 °F

    Rain/Snow
    Likely

Detailed Forecast

Today
Sunny, with a high near 34. Wind chill values as low as -5. West southwest wind 14 to 16 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 20. Southwest wind around 17 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 43. Southwest wind 13 to 15 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 29. Southwest wind 13 to 16 mph, with gusts as high as 22 mph.
Monday
Mostly sunny, with a high near 50. South southwest wind 11 to 15 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 33. South southwest wind 14 to 17 mph, with gusts as high as 24 mph.
Tuesday
Sunny, with a high near 53. South wind 16 to 20 mph, with gusts as high as 32 mph.
Tuesday Night
Partly cloudy, with a low around 35. South wind 13 to 15 mph, with gusts as high as 30 mph.
Wednesday
Rain and snow likely, becoming all snow after 3pm. Partly sunny, with a high near 44.
Wednesday Night
Snow. The snow could be heavy at times. Mostly cloudy, with a low around 25.
Thursday
Snow. The snow could be heavy at times. Cloudy, with a high near 27.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 16.
Friday
A chance of snow. Partly sunny, with a high near 31.
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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:
3:47 am MDT Apr 18, 2026
Forecast Valid:
5am MDT Apr 18, 2026-6pm MDT Apr 24, 2026
 
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Additional Resources

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Chance of Precipitation