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

Hazardous Weather Conditions

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

43°F

6°C

Humidity 43%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 28 Mar 08:10 PM MDT
Extended Forecast for

St Mary MT

Winter Weather Advisory March 29, 08:00pm until March 30, 10:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 32. West southwest wind around 14 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of snow before 1pm, then a chance of rain and snow. Mostly sunny, with a high near 45. Breezy, with a southwest wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 45 °F

    Breezy.
    Slight Chance
    Snow then
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain and snow before 7pm, then snow. Patchy blowing snow after midnight. Low around 27. Breezy, with a southwest wind 25 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 27 °F

    Rain/Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely. Patchy blowing snow before 10am. Mostly cloudy, with a high near 30. Breezy, with a west southwest wind 23 to 28 mph decreasing to 17 to 22 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 30 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow before midnight. Partly cloudy, with a low around 11. North northwest wind 5 to 10 mph becoming light and variable after midnight. New snow accumulation of less than a half inch possible.

    Low: 11 °F

    Chance Snow
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37. South southwest wind 3 to 7 mph.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 25. Southwest wind 5 to 7 mph.

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 32. West southwest wind around 14 mph, with gusts as high as 20 mph.
Sunday
A chance of snow before 1pm, then a chance of rain and snow. Mostly sunny, with a high near 45. Breezy, with a southwest wind 14 to 19 mph increasing to 24 to 29 mph in the afternoon. Winds could gust as high as 40 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Sunday Night
A chance of rain and snow before 7pm, then snow. Patchy blowing snow after midnight. Low around 27. Breezy, with a southwest wind 25 to 29 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday
Snow likely. Patchy blowing snow before 10am. Mostly cloudy, with a high near 30. Breezy, with a west southwest wind 23 to 28 mph decreasing to 17 to 22 mph in the afternoon. Winds could gust as high as 39 mph. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Monday Night
A 30 percent chance of snow before midnight. Partly cloudy, with a low around 11. North northwest wind 5 to 10 mph becoming light and variable after midnight. New snow accumulation of less than a half inch possible.
Tuesday
Mostly sunny, with a high near 37. South southwest wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 25. Southwest wind 5 to 7 mph.
Wednesday
Partly sunny, with a high near 46. Southwest wind 5 to 9 mph, with gusts as high as 20 mph.
Wednesday Night
A chance of rain before 9pm, then a chance of rain and snow between 9pm and 3am, then a chance of snow after 3am. Mostly cloudy, with a low around 30.
Thursday
Snow likely. Mostly cloudy, with a high near 41.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 25.
Friday
A chance of snow. Partly sunny, with a high near 41.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 46.
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:
8:41 pm MDT Mar 28, 2026
Forecast Valid:
8pm MDT Mar 28, 2026-6pm MDT Apr 4, 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