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

34°F

1°C

Humidity 55%
Wind Speed NA 8 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 18 Apr 04:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: Sunny, with a high near 49. Southwest wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 32. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 58. West southwest wind 6 to 9 mph, with gusts as high as 21 mph.

    High: 58 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. West southwest wind 6 to 9 mph, with gusts as high as 20 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 66. Southwest wind 3 to 8 mph.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 71. West southwest wind 5 to 8 mph.

    High: 71 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of rain after midnight. Mostly cloudy, with a low around 43. West southwest wind around 6 mph.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Wednesday

    Wednesday: A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 56.

    High: 56 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 49. Southwest wind 8 to 10 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 32. South southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Sunday
Sunny, with a high near 58. West southwest wind 6 to 9 mph, with gusts as high as 21 mph.
Sunday Night
Partly cloudy, with a low around 40. West southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Monday
Mostly sunny, with a high near 66. Southwest wind 3 to 8 mph.
Monday Night
Partly cloudy, with a low around 43. West southwest wind 5 to 8 mph, with gusts as high as 18 mph.
Tuesday
Mostly sunny, with a high near 71. West southwest wind 5 to 8 mph.
Tuesday Night
A slight chance of rain after midnight. Mostly cloudy, with a low around 43. West southwest wind around 6 mph.
Wednesday
A chance of rain, then showers likely and possibly a thunderstorm after noon. Mostly cloudy, with a high near 56.
Wednesday Night
Rain and snow, becoming all snow after 3am. Mostly cloudy, with a low around 30.
Thursday
A chance of snow. Partly sunny, with a high near 41.
Thursday Night
A slight chance of snow. Mostly cloudy, with a low around 24.
Friday
A slight chance of snow. Mostly sunny, with a high near 42.
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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:
3:47 am MDT Apr 18, 2026
Forecast Valid:
4am MDT Apr 18, 2026-6pm MDT Apr 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation