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

Heat Persists Across the Central and Western U.S.; Fire Weather Concerns in the Rockies and High Plains

Record-breaking heat expected in the Central and Western U.S. for the next several days. Gusty winds and low relative humidity will create elevated to critical fire weather conditions over portions of the Rockies and High Plains Wednesday and Thursday. Rain and mountain snow are possible across the Pacific Northwest into the Rockies through Wednesday. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

NA

42°F

6°C

Humidity 54%
Wind Speed NA 7 MPH
Barometer NA
Dewpoint 26°F (-3°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 25 Mar 05:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: A slight chance of rain and snow before 10am, then a slight chance of snow between 10am and 11am. Mostly sunny, with a high near 44. Southwest wind 17 to 21 mph, with gusts as high as 46 mph. Chance of precipitation is 20%.

    High: 44 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny

  • Tonight

    Tonight: Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. West southwest wind 9 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Low: 21 °F

    Chance Snow
    then Snow
    Likely

  • Thursday

    Thursday: A 40 percent chance of snow. Partly sunny, with a high near 35. West wind 9 to 13 mph, with gusts as high as 28 mph. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 22. West southwest wind 7 to 11 mph, with gusts as high as 25 mph.

    Low: 22 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 45. Southwest wind around 8 mph, with gusts as high as 18 mph.

    High: 45 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 29. Southwest wind around 7 mph.

    Low: 29 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 53. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.

    High: 53 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. West southwest wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of rain and snow before 10am, then a slight chance of snow between 10am and 11am. Mostly sunny, with a high near 44. Southwest wind 17 to 21 mph, with gusts as high as 46 mph. Chance of precipitation is 20%.
Tonight
Snow likely, mainly after midnight. Mostly cloudy, with a low around 21. West southwest wind 9 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Thursday
A 40 percent chance of snow. Partly sunny, with a high near 35. West wind 9 to 13 mph, with gusts as high as 28 mph. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly clear, with a low around 22. West southwest wind 7 to 11 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 45. Southwest wind around 8 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 29. Southwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 53. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.
Saturday Night
Partly cloudy, with a low around 35. West southwest wind 7 to 9 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
A slight chance of rain before 9pm, then a slight chance of rain and snow. Mostly cloudy, with a low around 34.
Monday
A chance of rain and snow. Partly sunny, with a high near 46.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 27.
Tuesday
A chance of snow. Partly sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
5:02 am MDT Mar 25, 2026
Forecast Valid:
5am MDT Mar 25, 2026-6pm MDT Mar 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

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