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

52°F

11°C

Humidity 83%
Wind Speed NW 0 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Last update 02 Aug 02:00 AM MDT
Extended Forecast for

4 Miles E Big Sky MT

  • Overnight

    Overnight: Mostly clear, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Clear

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 80. Calm wind becoming west 5 to 7 mph in the afternoon.

    High: 80 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 46. West northwest wind around 6 mph becoming calm in the evening.

    Low: 46 °F

    Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.

    High: 81 °F

    Sunny then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48. West wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 84 °F

    Sunny then
    Slight Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 46. Southwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.

    Low: 46 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 47. Calm wind.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 80. Calm wind becoming west 5 to 7 mph in the afternoon.
Saturday Night
A 30 percent chance of showers and thunderstorms, mainly before 10pm. Partly cloudy, with a low around 46. West northwest wind around 6 mph becoming calm in the evening.
Sunday
A slight chance of showers between noon and 3pm, then a slight chance of showers and thunderstorms after 3pm. Sunny, with a high near 81. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 48. West wind around 5 mph becoming calm in the evening.
Monday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 84. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 46. Southwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 18 mph.
Tuesday
Sunny, with a high near 79. Light south southwest wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E Big Sky MT
 45.26°N 111.26°W (Elev. 5997 ft)
Last Update:
1:16 am MDT Aug 2, 2025
Forecast Valid:
2am MDT Aug 2, 2025-6pm MDT Aug 8, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation