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

18°F

-8°C

Humidity 83%
Wind Speed NA 1 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Last update 08 Apr 07:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: Mostly sunny, with a high near 48. North northeast wind 5 to 7 mph becoming south southwest in the afternoon.

    High: 48 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of snow between 2am and 5am. Partly cloudy, with a low around 27. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 27 °F

    Partly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 50. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. South southeast wind 3 to 5 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 61. South southwest wind 3 to 6 mph.

    High: 61 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38. South southwest wind 3 to 6 mph.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Partly sunny, with a high near 63. South southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.

    High: 63 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 38. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 38 °F

    Chance Rain

  • Sunday

    Sunday: A chance of rain. Partly sunny, with a high near 48.

    High: 48 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 48. North northeast wind 5 to 7 mph becoming south southwest in the afternoon.
Tonight
A slight chance of snow between 2am and 5am. Partly cloudy, with a low around 27. Southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 50. Calm wind becoming southeast around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 31. South southeast wind 3 to 5 mph.
Friday
Sunny, with a high near 61. South southwest wind 3 to 6 mph.
Friday Night
Partly cloudy, with a low around 38. South southwest wind 3 to 6 mph.
Saturday
A 20 percent chance of rain after noon. Partly sunny, with a high near 63. South southwest wind 3 to 8 mph. Winds could gust as high as 18 mph.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 38. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Sunday
A chance of rain. Partly sunny, with a high near 48.
Sunday 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 29.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 42.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 28.
Tuesday
Partly sunny, with a high near 48.
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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:
7:17 am MDT Apr 8, 2026
Forecast Valid:
8am MDT Apr 8, 2026-6pm MDT Apr 14, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation