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

57°F

14°C

Humidity 34%
Wind Speed E 2 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Last update 17 Mar 04:30 PM MDT
Extended Forecast for

12 Miles NE Big Sky MT

  • This Afternoon

    This Afternoon: A 20 percent chance of rain before 5pm. Mostly cloudy, with a high near 53. West wind around 9 mph, with gusts as high as 24 mph.

    High: 53 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Mostly cloudy, with a low around 40. West southwest wind 6 to 8 mph becoming south after midnight. Winds could gust as high as 21 mph.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 60. South wind 8 to 13 mph becoming west in the afternoon. Winds could gust as high as 32 mph.

    High: 60 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. South southwest wind 6 to 8 mph, with gusts as high as 26 mph.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. South southwest wind 7 to 11 mph, with gusts as high as 26 mph.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44. Southwest wind around 8 mph, with gusts as high as 23 mph.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 67. South southwest wind 7 to 10 mph, with gusts as high as 29 mph.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 45. South wind around 7 mph, with gusts as high as 23 mph.

    Low: 45 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of rain, mainly after noon. Partly sunny, with a high near 62.

    High: 62 °F

    Chance Rain

Detailed Forecast

This Afternoon
A 20 percent chance of rain before 5pm. Mostly cloudy, with a high near 53. West wind around 9 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, with a low around 40. West southwest wind 6 to 8 mph becoming south after midnight. Winds could gust as high as 21 mph.
Wednesday
Mostly sunny, with a high near 60. South wind 8 to 13 mph becoming west in the afternoon. Winds could gust as high as 32 mph.
Wednesday Night
Mostly cloudy, with a low around 42. South southwest wind 6 to 8 mph, with gusts as high as 26 mph.
Thursday
Mostly sunny, with a high near 64. South southwest wind 7 to 11 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around 44. Southwest wind around 8 mph, with gusts as high as 23 mph.
Friday
Mostly sunny, with a high near 67. South southwest wind 7 to 10 mph, with gusts as high as 29 mph.
Friday Night
Partly cloudy, with a low around 45. South wind around 7 mph, with gusts as high as 23 mph.
Saturday
A chance of rain, mainly after noon. Partly sunny, with a high near 62.
Saturday Night
A slight chance of rain and snow before midnight. Partly cloudy, with a low around 27.
Sunday
A slight chance of snow. Mostly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 28.
Monday
A slight chance of rain and snow. Partly sunny, with a high near 53.
Monday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 34.
Tuesday
A chance of rain and snow. Mostly cloudy, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles NE Big Sky MT
 45.39°N 111.19°W (Elev. 6998 ft)
Last Update:
12:42 pm MDT Mar 17, 2026
Forecast Valid:
4pm 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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation