National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

NA

22°F

-6°C

Humidity 86%
Wind Speed NA 2 MPH
Barometer NA
Dewpoint 18°F (-8°C)
Visibility NA
Last update 29 Mar 05:10 AM MDT
Extended Forecast for

St Mary MT

Winter Weather Advisory March 29, 08:00pm until March 30, 10:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: A chance of rain and snow before 4pm, then a chance of rain between 4pm and 5pm, then a chance of rain and snow after 5pm. Mostly sunny, with a high near 45. Southwest wind 6 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 45 °F

    Mostly Sunny
    then Chance
    Rain/Snow

  • Tonight

    Tonight: A chance of rain and snow before 7pm, then a chance of snow. Mostly cloudy, with a low around 26. Southwest wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 50%. New snow accumulation of around an inch possible.

    Low: 26 °F

    Chance
    Rain/Snow
    then Chance
    Snow

  • Monday

    Monday: Snow. Steady temperature around 29. West southwest wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 29 °F

    Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind 5 to 8 mph becoming calm in the evening. New snow accumulation of around an inch possible.

    Low: 15 °F

    Chance Snow
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 40. South wind 3 to 6 mph.

    High: 40 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. South wind around 6 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 48. Southwest wind 5 to 8 mph.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain before 9pm, then rain and snow likely. Mostly cloudy, with a low around 29. South wind 6 to 8 mph becoming north in the evening.

    Low: 29 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: Snow. Mostly cloudy, with a high near 38.

    High: 38 °F

    Snow

Detailed Forecast

Today
A chance of rain and snow before 4pm, then a chance of rain between 4pm and 5pm, then a chance of rain and snow after 5pm. Mostly sunny, with a high near 45. Southwest wind 6 to 16 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tonight
A chance of rain and snow before 7pm, then a chance of snow. Mostly cloudy, with a low around 26. Southwest wind 9 to 14 mph, with gusts as high as 31 mph. Chance of precipitation is 50%. New snow accumulation of around an inch possible.
Monday
Snow. Steady temperature around 29. West southwest wind 8 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Monday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15. Northwest wind 5 to 8 mph becoming calm in the evening. New snow accumulation of around an inch possible.
Tuesday
Mostly sunny, with a high near 40. South wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 24. South wind around 6 mph.
Wednesday
Partly sunny, with a high near 48. Southwest wind 5 to 8 mph.
Wednesday Night
A chance of rain before 9pm, then rain and snow likely. Mostly cloudy, with a low around 29. South wind 6 to 8 mph becoming north in the evening.
Thursday
Snow. Mostly cloudy, with a high near 38.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 23.
Friday
A chance of snow. Partly sunny, with a high near 42.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 29.
Saturday
Mostly sunny, with a high near 46.
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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:
3:46 am MDT Mar 29, 2026
Forecast Valid:
5am MDT Mar 29, 2026-6pm MDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation