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.

NA

65°F

18°C

Humidity 18%
Wind Speed S 5 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Last update 18 Oct 04:30 PM MDT
Extended Forecast for

11 Miles E Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 33. South wind 6 to 15 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 48. South wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 48 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 34. South wind 10 to 14 mph, with gusts as high as 20 mph.

    Low: 34 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of snow after noon, mixing with rain after 3pm. Mostly sunny, with a high near 46. South wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 46 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 35. North wind 5 to 8 mph becoming south after midnight.

    Low: 35 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. South wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 37. South wind 7 to 11 mph.

    Low: 37 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 47. South wind 10 to 15 mph, with gusts as high as 26 mph.

    High: 47 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Rain likely before 3am, then rain and snow likely. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain
    then
    Rain/Snow
    Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 33. South wind 6 to 15 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 48. South wind 11 to 14 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 34. South wind 10 to 14 mph, with gusts as high as 20 mph.
Tuesday
A slight chance of snow after noon, mixing with rain after 3pm. Mostly sunny, with a high near 46. South wind 6 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 35. North wind 5 to 8 mph becoming south after midnight.
Wednesday
Mostly sunny, with a high near 48. South wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 37. South wind 7 to 11 mph.
Thursday
Mostly sunny, with a high near 47. South wind 10 to 15 mph, with gusts as high as 26 mph.
Thursday Night
Rain likely before 3am, then rain and snow likely. Mostly cloudy, with a low around 33.
Friday
Rain and snow, becoming all snow after 9am. The snow could be heavy at times. Cloudy, with a high near 36.
Friday Night
Snow likely. Mostly cloudy, with a low around 26.
Saturday
A slight chance of snow. Mostly sunny, with a high near 31.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 26.
Sunday
A slight chance of snow. Mostly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles E Big Sky MT
 45.27°N 111.11°W (Elev. 9341 ft)
Last Update:
12:31 pm MDT Oct 18, 2026
Forecast Valid:
4pm MDT Oct 18, 2026-6pm MDT Oct 25, 2026
 
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Additional Resources

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Chance of Precipitation