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

36°F

2°C

Humidity 83%
Wind Speed NA 0 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 13 Apr 02:10 AM MDT
Extended Forecast for

St Mary MT

  • Overnight

    Overnight: A slight chance of rain before 5am, then a slight chance of rain and snow. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 34. Calm wind. Chance of precipitation is 20%.

    Low: 34 °F

    Slight Chance
    Rain/Snow and
    Patchy Fog

  • Monday

    Monday: A chance of rain before 11am, then a chance of rain after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 52. Light south wind becoming west southwest 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 50%.

    High: 52 °F

    Chance Rain
    and Patchy
    Fog

  • Monday Night

    Monday Night: A 20 percent chance of rain before 2am. Mostly cloudy, with a low around 36. Southwest wind 11 to 16 mph, with gusts as high as 33 mph.

    Low: 36 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Partly sunny, with a high near 45. West southwest wind 17 to 20 mph, with gusts as high as 40 mph.

    High: 45 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind 15 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Slight Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: Snow likely, mainly after noon. Partly sunny, with a high near 46. West southwest wind 14 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 46 °F

    Snow Likely

  • Wednesday Night

    Wednesday Night: Snow. Low around 21. West southwest wind around 11 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 21 °F

    Snow

  • Thursday

    Thursday: Snow. Mostly cloudy, with a high near 35. North northwest wind 9 to 11 mph, with gusts as high as 24 mph.

    High: 35 °F

    Snow

  • Thursday Night

    Thursday Night: A chance of snow before midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Chance Snow
    then Partly
    Cloudy

Detailed Forecast

Overnight
A slight chance of rain before 5am, then a slight chance of rain and snow. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 34. Calm wind. Chance of precipitation is 20%.
Monday
A chance of rain before 11am, then a chance of rain after 3pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 52. Light south wind becoming west southwest 6 to 11 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 50%.
Monday Night
A 20 percent chance of rain before 2am. Mostly cloudy, with a low around 36. Southwest wind 11 to 16 mph, with gusts as high as 33 mph.
Tuesday
Partly sunny, with a high near 45. West southwest wind 17 to 20 mph, with gusts as high as 40 mph.
Tuesday Night
A slight chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind 15 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Wednesday
Snow likely, mainly after noon. Partly sunny, with a high near 46. West southwest wind 14 to 16 mph, with gusts as high as 34 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow. Low around 21. West southwest wind around 11 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Thursday
Snow. Mostly cloudy, with a high near 35. North northwest wind 9 to 11 mph, with gusts as high as 24 mph.
Thursday Night
A chance of snow before midnight. Mostly cloudy, with a low around 20.
Friday
A slight chance of snow after noon. Mostly sunny, with a high near 43.
Friday Night
Partly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
A slight chance of rain and snow. Mostly sunny, with a high near 54.
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:
12:27 am MDT Apr 13, 2026
Forecast Valid:
3am MDT Apr 13, 2026-6pm MDT Apr 19, 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