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

Early Heat Wave in the West; Fire Concerns in the Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

50°F

10°C

Humidity 52%
Wind Speed ESE 5 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill48°F (9°C)
Last update 17 Mar 05:45 PM MDT
Extended Forecast for

14 Miles ESE Big Sky MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Breezy, with a west southwest wind 18 to 23 mph, with gusts as high as 29 mph.

    Low: 32 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Breezy

  • Wednesday

    Wednesday: Sunny, with a high near 46. Breezy, with a west southwest wind around 24 mph, with gusts as high as 39 mph.

    High: 46 °F

    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 35. Breezy, with a west southwest wind 20 to 22 mph, with gusts as high as 33 mph.

    Low: 35 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 49. Southwest wind around 21 mph, with gusts as high as 34 mph.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 36. Southwest wind around 21 mph, with gusts as high as 31 mph.

    Low: 36 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 51. Breezy, with a southwest wind 20 to 22 mph, with gusts as high as 36 mph.

    High: 51 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. South southwest wind around 20 mph, with gusts as high as 31 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of snow after noon. Partly sunny, with a high near 48. South southwest wind 18 to 20 mph, with gusts as high as 32 mph.

    High: 48 °F

    Partly Sunny
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A slight chance of snow before midnight. Partly cloudy, with a low around 24.

    Low: 24 °F

    Slight Chance
    Snow then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 32. Breezy, with a west southwest wind 18 to 23 mph, with gusts as high as 29 mph.
Wednesday
Sunny, with a high near 46. Breezy, with a west southwest wind around 24 mph, with gusts as high as 39 mph.
Wednesday Night
Partly cloudy, with a low around 35. Breezy, with a west southwest wind 20 to 22 mph, with gusts as high as 33 mph.
Thursday
Mostly sunny, with a high near 49. Southwest wind around 21 mph, with gusts as high as 34 mph.
Thursday Night
Partly cloudy, with a low around 36. Southwest wind around 21 mph, with gusts as high as 31 mph.
Friday
Mostly sunny, with a high near 51. Breezy, with a southwest wind 20 to 22 mph, with gusts as high as 36 mph.
Friday Night
Partly cloudy, with a low around 38. South southwest wind around 20 mph, with gusts as high as 31 mph.
Saturday
A chance of snow after noon. Partly sunny, with a high near 48. South southwest wind 18 to 20 mph, with gusts as high as 32 mph.
Saturday Night
A slight chance of snow before midnight. Partly cloudy, with a low around 24.
Sunday
A slight chance of snow after noon. Mostly sunny, with a high near 37.
Sunday Night
Partly cloudy, with a low around 25.
Monday
A slight chance of snow. Mostly sunny, with a high near 40.
Monday Night
A chance of snow. Mostly cloudy, with a low around 29.
Tuesday
A chance of snow. Mostly cloudy, with a high near 40. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
14 Miles ESE Big Sky MT
 45.17°N 111.09°W (Elev. 9400 ft)
Last Update:
5:47 pm MDT Mar 17, 2026
Forecast Valid:
6pm MDT Mar 17, 2026-6pm MDT Mar 24, 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