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

58°F

14°C

Humidity 30%
Wind Speed NA 5 MPH
Barometer NA
Dewpoint 27°F (-3°C)
Visibility NA
Last update 08 Oct 03:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: Increasing clouds, with a high near 68. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.

    High: 68 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. Southwest wind 10 to 15 mph, with gusts as high as 38 mph.

    Low: 48 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 64. West southwest wind 16 to 18 mph, with gusts as high as 44 mph.

    High: 64 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Rain showers likely before midnight, then rain and snow. Low around 26. West southwest wind 6 to 14 mph becoming north after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 26 °F

    Showers
    Likely then
    Rain/Snow

  • Saturday

    Saturday: Snow. High near 35. North wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 35 °F

    Snow

  • Saturday Night

    Saturday Night: Snow. Low around 18. North northeast wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

    Low: 18 °F

    Snow

  • Sunday

    Sunday: Snow, mainly before noon. High near 31. North northeast wind around 8 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Snow then
    Chance Snow

  • Sunday Night

    Sunday Night: A chance of snow, mainly before midnight. Mostly cloudy, with a low around 16. East northeast wind around 5 mph becoming calm in the evening.

    Low: 16 °F

    Chance Snow

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 68. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.
Tonight
Mostly cloudy, with a low around 48. Southwest wind 10 to 15 mph, with gusts as high as 38 mph.
Friday
A 30 percent chance of showers after 2pm. Mostly sunny, with a high near 64. West southwest wind 16 to 18 mph, with gusts as high as 44 mph.
Friday Night
Rain showers likely before midnight, then rain and snow. Low around 26. West southwest wind 6 to 14 mph becoming north after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Saturday
Snow. High near 35. North wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 18. North northeast wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.
Sunday
Snow, mainly before noon. High near 31. North northeast wind around 8 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
A chance of snow, mainly before midnight. Mostly cloudy, with a low around 16. East northeast wind around 5 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 41.
Monday Night
Mostly clear, with a low around 24.
Tuesday
Mostly sunny, with a high near 50.
Tuesday Night
A slight chance of rain and snow. Partly cloudy, with a low around 29.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 50.
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:
12:31 am MDT Oct 8, 2026
Forecast Valid:
4am MDT Oct 8, 2026-6pm MDT Oct 14, 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