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

29°F

-2°C

Humidity 59%
Wind Speed NA 0 MPH
Barometer NA
Dewpoint 17°F (-8°C)
Visibility NA
Last update 09 Apr 11:10 PM MDT
Extended Forecast for

St Mary MT

  • Tonight

    Tonight: Mostly clear, with a low around 32. Light south wind.

    Low: 32 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 60. Calm wind becoming south southwest around 5 mph in the afternoon.

    High: 60 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39. South southwest wind around 5 mph becoming calm in the evening.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers after noon. Partly sunny, with a high near 60. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.

    High: 60 °F

    Partly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 37. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    Low: 37 °F

    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of rain. Mostly cloudy, with a high near 51. West wind around 7 mph becoming north northeast in the afternoon.

    High: 51 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 36. East northeast wind around 6 mph becoming light and variable after midnight.

    Low: 36 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly after noon. Mostly cloudy, with a high near 53. West southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.

    High: 53 °F

    Rain Likely

  • Monday Night

    Monday Night: A chance of rain before midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Light south wind.
Friday
Mostly sunny, with a high near 60. Calm wind becoming south southwest around 5 mph in the afternoon.
Friday Night
Mostly cloudy, with a low around 39. South southwest wind around 5 mph becoming calm in the evening.
Saturday
A 40 percent chance of showers after noon. Partly sunny, with a high near 60. Light south southwest wind becoming west southwest 5 to 10 mph in the afternoon. Winds could gust as high as 18 mph.
Saturday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 37. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 51. West wind around 7 mph becoming north northeast in the afternoon.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 36. East northeast wind around 6 mph becoming light and variable after midnight.
Monday
Rain likely, mainly after noon. Mostly cloudy, with a high near 53. West southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Monday Night
A chance of rain before midnight. Mostly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 46.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 32.
Wednesday
Snow likely. Mostly cloudy, with a high near 42.
Wednesday Night
Snow likely. Mostly cloudy, with a low around 23.
Thursday
A chance of snow. Partly sunny, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
10:37 pm MDT Apr 9, 2026
Forecast Valid:
11pm MDT Apr 9, 2026-6pm MDT Apr 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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