National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Showers and Thunderstorms to Start the Work Week

Areas of rain and thunderstorms are forecast Monday across the central and eastern states. Some mixed rain and snow is possible in the high Sierra Mountains. Heavy to excessive rain may bring flooding in the central Appalachians. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

Lat: 45.34534°NLon: 111.17261°WElev: 5699.0ft.

unknown precip

41°F

5°C

Humidity NA
Wind Speed SSW 0 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update NA
Extended Forecast for

6 Miles ENE Big Sky MT

  • Tonight

    Tonight: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70. Light and variable wind.

    High: 70 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. Calm wind becoming south around 5 mph after midnight.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. South wind around 5 mph becoming calm in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 46. Light south southwest wind.

    Low: 46 °F

    Chance Rain

  • Wednesday

    Wednesday: Sunny, with a high near 70. South southwest wind around 6 mph becoming calm.

    High: 70 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. South wind 5 to 8 mph.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 74. South wind 6 to 9 mph.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 39. Calm wind.
Monday
Sunny, with a high near 70. Light and variable wind.
Monday Night
Partly cloudy, with a low around 43. Calm wind becoming south around 5 mph after midnight.
Tuesday
Mostly sunny, with a high near 71. South wind around 5 mph becoming calm in the afternoon.
Tuesday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 46. Light south southwest wind.
Wednesday
Sunny, with a high near 70. South southwest wind around 6 mph becoming calm.
Wednesday Night
Mostly clear, with a low around 46. South wind 5 to 8 mph.
Thursday
Sunny, with a high near 74. South wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 49.
Friday
Mostly sunny, with a high near 73.
Friday Night
A slight chance of rain. Partly cloudy, with a low around 45.
Saturday
A slight chance of rain. Mostly sunny, with a high near 64.
Saturday Night
A slight chance of rain. Mostly cloudy, with a low around 40.
Sunday
A slight chance of rain. Partly sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
6 Miles ENE Big Sky MT
 45.31°N 111.2°W (Elev. 6234 ft)
Last Update:
10:46 pm MDT Sep 20, 2026
Forecast Valid:
11pm MDT Sep 20, 2026-6pm MDT Sep 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation