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

33°F

1°C

Humidity 82%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill24°F (-4°C)
Last update 29 Mar 06:10 PM 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

  • Tonight

    Tonight: Rain and snow, becoming all snow after 11pm. Patchy blowing snow after 3am. Low around 26. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.

    Low: 26 °F

    Rain/Snow and
    Breezy then
    Snow and
    Patchy
    Blowing Snow

  • Monday

    Monday: Snow likely. Patchy blowing snow before noon. Mostly cloudy, with a temperature falling to around 27 by 8am. Breezy, with a west southwest wind 13 to 23 mph becoming north in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 30 °F⇓

    Snow Likely
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A 40 percent chance of snow, mainly before 9pm. Partly cloudy, with a low around 10. North wind 5 to 11 mph becoming south after midnight. New snow accumulation of less than one inch possible.

    Low: 10 °F

    Chance Snow
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 39. South wind 5 to 7 mph.

    High: 39 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. South wind 5 to 7 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46. South southwest wind 3 to 7 mph.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain before 9pm, then rain and snow likely. Mostly cloudy, with a low around 31. South southwest wind around 6 mph becoming west northwest after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 31 °F

    Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Snow. Cloudy, with a high near 38. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.

    High: 38 °F

    Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 24.

    Low: 24 °F

    Snow Likely

Detailed Forecast

Tonight
Rain and snow, becoming all snow after 11pm. Patchy blowing snow after 3am. Low around 26. Breezy, with a southwest wind 18 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than one inch possible.
Monday
Snow likely. Patchy blowing snow before noon. Mostly cloudy, with a temperature falling to around 27 by 8am. Breezy, with a west southwest wind 13 to 23 mph becoming north in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Monday Night
A 40 percent chance of snow, mainly before 9pm. Partly cloudy, with a low around 10. North wind 5 to 11 mph becoming south after midnight. New snow accumulation of less than one inch possible.
Tuesday
Mostly cloudy, with a high near 39. South wind 5 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 23. South wind 5 to 7 mph.
Wednesday
Partly sunny, with a high near 46. South southwest wind 3 to 7 mph.
Wednesday Night
A chance of rain before 9pm, then rain and snow likely. Mostly cloudy, with a low around 31. South southwest wind around 6 mph becoming west northwest after midnight. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Thursday
Snow. Cloudy, with a high near 38. Northwest wind 6 to 13 mph, with gusts as high as 25 mph.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 24.
Friday
A chance of snow. Partly sunny, with a high near 40.
Friday Night
A chance of snow. Mostly cloudy, with a low around 27.
Saturday
Mostly sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly 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:
6:22 pm MDT Mar 29, 2026
Forecast Valid:
6pm MDT Mar 29, 2026-6pm MDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation