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

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

63°F

17°C

Humidity 21%
Wind Speed NA 9 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 20 Apr 04:10 PM MDT
Extended Forecast for

St Mary MT

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. South southwest wind 6 to 9 mph, with gusts as high as 21 mph.

    Low: 44 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 72. South southwest wind around 6 mph.

    High: 72 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. South southwest wind around 5 mph becoming light and variable in the evening.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 56. Light north northwest wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 80%.

    High: 56 °F

    Chance Rain
    then Showers

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow, becoming all snow after 3am. Low around 27. North northwest wind 10 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

    Low: 27 °F

    Rain/Snow

  • Thursday

    Thursday: Snow likely, mainly before noon. Mostly cloudy, with a high near 39. North wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 39 °F

    Snow Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of snow. Mostly cloudy, with a low around 23. North northwest wind 8 to 11 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Chance Snow

  • Friday

    Friday: A chance of snow, mainly before noon. Partly sunny, with a high near 37. North wind 7 to 11 mph, with gusts as high as 24 mph.

    High: 37 °F

    Chance Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 44. South southwest wind 6 to 9 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 72. South southwest wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 43. South southwest wind around 5 mph becoming light and variable in the evening.
Wednesday
Rain, mainly between noon and 3pm, then showers and possibly a thunderstorm after 3pm. High near 56. Light north northwest wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 80%.
Wednesday Night
Rain, possibly mixed with snow, becoming all snow after 3am. Low around 27. North northwest wind 10 to 14 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.
Thursday
Snow likely, mainly before noon. Mostly cloudy, with a high near 39. North wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 23. North northwest wind 8 to 11 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.
Friday
A chance of snow, mainly before noon. Partly sunny, with a high near 37. North wind 7 to 11 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Mostly cloudy, with a low around 28.
Monday
A slight chance of rain and snow. Mostly sunny, with a high near 51.
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:
4:06 pm MDT Apr 20, 2026
Forecast Valid:
4pm MDT Apr 20, 2026-6pm MDT Apr 27, 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