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

25°F

-4°C

Humidity 70%
Wind Speed NA 1 MPH
Barometer NA
Dewpoint 16°F (-9°C)
Visibility NA
Last update 17 Apr 07:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: A chance of snow before 10am, then a chance of snow showers after 10am. Mostly cloudy, with a high near 36. Southwest wind 5 to 7 mph becoming north in the afternoon. Chance of precipitation is 50%. Total daytime snow accumulation of around an inch possible.

    High: 36 °F

    Chance Snow

  • Tonight

    Tonight: A 20 percent chance of snow showers before 7pm. Mostly clear, with a low around 26. Northwest wind 5 to 7 mph becoming south southwest in the evening.

    Low: 26 °F

    Slight Chance
    Snow Showers
    then Mostly
    Clear

  • Saturday

    Saturday: Sunny, with a high near 49. West southwest wind 8 to 11 mph, with gusts as high as 23 mph.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 33. West southwest wind 7 to 9 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 58. West southwest wind 7 to 9 mph, with gusts as high as 20 mph.

    High: 58 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 66. West southwest wind 5 to 8 mph.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: 42 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

Today
A chance of snow before 10am, then a chance of snow showers after 10am. Mostly cloudy, with a high near 36. Southwest wind 5 to 7 mph becoming north in the afternoon. Chance of precipitation is 50%. Total daytime snow accumulation of around an inch possible.
Tonight
A 20 percent chance of snow showers before 7pm. Mostly clear, with a low around 26. Northwest wind 5 to 7 mph becoming south southwest in the evening.
Saturday
Sunny, with a high near 49. West southwest wind 8 to 11 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 33. West southwest wind 7 to 9 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 58. West southwest wind 7 to 9 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 40. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 66. West southwest wind 5 to 8 mph.
Monday Night
Partly cloudy, with a low around 42. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.
Tuesday
Sunny, with a high near 70.
Tuesday Night
A slight chance of rain. Partly cloudy, with a low around 44.
Wednesday
A chance of rain. Partly sunny, with a high near 61.
Wednesday Night
Rain and snow likely. Mostly cloudy, with a low around 37.
Thursday
A chance of rain and snow. Partly sunny, with a high near 49.
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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:
5:16 am MDT Apr 17, 2026
Forecast Valid:
7am MDT Apr 17, 2026-6pm MDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation