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

Fire Weather in the Central and Southern Plains; Pacific Storms Impacting the West

Gusty to high winds and low relative humidity will bring elevated to critical fire weather to the central and southern Plains into Wednesday. Two Pacific storms will impact the western U.S. into Wednesday with gusty winds, low elevation rain, and heavy mountain snow. Read More >

Hazardous Weather Conditions

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

35°F

2°C

Humidity 76%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 16 Feb 09:10 PM MST
Extended Forecast for

St Mary MT

Winter Weather Advisory February 17, 02:00am until February 17, 05:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A slight chance of rain and snow before 2am, then snow likely. The snow could be heavy at times. Increasing clouds, with a low around 23. South southwest wind around 6 mph becoming east northeast after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.

    Low: 23 °F

    Slight Chance
    Rain/Snow
    then Heavy
    Snow

  • Tuesday

    Tuesday: Snow, mainly before 1pm. The snow could be heavy at times. Temperature rising to near 29 by noon, then falling to around 18 during the remainder of the day. North wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.

    High: 29 °F⇓

    Heavy Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around -3. Wind chill values as low as -15. North wind 6 to 9 mph, with gusts as high as 21 mph. New snow accumulation of less than a half inch possible.

    Low: -3 °F

    Chance Snow

  • Wednesday

    Wednesday: A 40 percent chance of snow. Mostly cloudy, with a high near 7. Wind chill values as low as -15. North northeast wind around 7 mph. Little or no snow accumulation expected.

    High: 7 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow. Mostly cloudy, with a low around -5. Northeast wind 3 to 6 mph. Little or no snow accumulation expected.

    Low: -5 °F

    Chance Snow

  • Thursday

    Thursday: A 20 percent chance of snow. Partly sunny, with a high near 21. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 21 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: A 20 percent chance of snow. Mostly cloudy, with a low around 9. Southwest wind around 6 mph.

    Low: 9 °F

    Slight Chance
    Snow

  • Friday

    Friday: A chance of snow, mainly after 11am. Partly sunny, with a high near 27. West southwest wind 6 to 10 mph, with gusts as high as 23 mph.

    High: 27 °F

    Chance Snow

  • Friday Night

    Friday Night: A slight chance of snow. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Slight Chance
    Snow

Detailed Forecast

Tonight
A slight chance of rain and snow before 2am, then snow likely. The snow could be heavy at times. Increasing clouds, with a low around 23. South southwest wind around 6 mph becoming east northeast after midnight. Chance of precipitation is 60%. Total nighttime snow accumulation of less than one inch possible.
Tuesday
Snow, mainly before 1pm. The snow could be heavy at times. Temperature rising to near 29 by noon, then falling to around 18 during the remainder of the day. North wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 7 inches possible.
Tuesday Night
A 40 percent chance of snow, mainly before 11pm. Mostly cloudy, with a low around -3. Wind chill values as low as -15. North wind 6 to 9 mph, with gusts as high as 21 mph. New snow accumulation of less than a half inch possible.
Wednesday
A 40 percent chance of snow. Mostly cloudy, with a high near 7. Wind chill values as low as -15. North northeast wind around 7 mph. Little or no snow accumulation expected.
Wednesday Night
A 30 percent chance of snow. Mostly cloudy, with a low around -5. Northeast wind 3 to 6 mph. Little or no snow accumulation expected.
Thursday
A 20 percent chance of snow. Partly sunny, with a high near 21. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Thursday Night
A 20 percent chance of snow. Mostly cloudy, with a low around 9. Southwest wind around 6 mph.
Friday
A chance of snow, mainly after 11am. Partly sunny, with a high near 27. West southwest wind 6 to 10 mph, with gusts as high as 23 mph.
Friday Night
A slight chance of snow. Mostly cloudy, with a low around 13.
Saturday
A slight chance of snow. Mostly sunny, with a high near 30.
Saturday Night
A slight chance of snow. Partly cloudy, with a low around 11.
Sunday
A slight chance of snow. Partly sunny, with a high near 35.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 22.
Monday
A chance of snow. Partly sunny, with a high near 40.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
3:34 pm MST Feb 16, 2026
Forecast Valid:
10pm MST Feb 16, 2026-6pm MST Feb 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

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