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

23°F

-5°C

Humidity 86%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Last update 29 Mar 03:10 AM MDT
Extended Forecast for

5 Miles WSW 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

  • Overnight

    Overnight: A 20 percent chance of snow. Partly cloudy, with a low around 27. West southwest wind around 18 mph, with gusts as high as 30 mph.

    Low: 27 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Snow likely, mainly after 1pm. Partly sunny, with a high near 30. Windy, with a west southwest wind 18 to 23 mph increasing to 31 to 36 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    High: 30 °F

    Windy. Chance
    Snow then
    Snow Likely

  • Sunday Night

    Sunday Night: Snow likely, mainly before 4am. The snow could be heavy at times. Widespread blowing snow, mainly between 8pm and 4am. Mostly cloudy, with a low around 16. Breezy, with a west southwest wind 22 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of 4 to 8 inches possible.

    Low: 16 °F

    Heavy Snow
    and Blowing
    Snow

  • Monday

    Monday: Snow. Patchy blowing snow before 9am. High near 20. Wind chill values as low as zero. West southwest wind 17 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    High: 20 °F

    Snow and
    Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7. West southwest wind 7 to 15 mph, with gusts as high as 24 mph. New snow accumulation of around an inch possible.

    Low: 7 °F

    Chance Snow
    then Partly
    Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28. Southwest wind 8 to 13 mph, with gusts as high as 22 mph.

    High: 28 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. Southwest wind around 11 mph, with gusts as high as 23 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 34. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.

    High: 34 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Snow likely, mainly after midnight. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Snow Likely

Detailed Forecast

Overnight
A 20 percent chance of snow. Partly cloudy, with a low around 27. West southwest wind around 18 mph, with gusts as high as 30 mph.
Sunday
Snow likely, mainly after 1pm. Partly sunny, with a high near 30. Windy, with a west southwest wind 18 to 23 mph increasing to 31 to 36 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
Snow likely, mainly before 4am. The snow could be heavy at times. Widespread blowing snow, mainly between 8pm and 4am. Mostly cloudy, with a low around 16. Breezy, with a west southwest wind 22 to 26 mph, with gusts as high as 43 mph. Chance of precipitation is 60%. New snow accumulation of 4 to 8 inches possible.
Monday
Snow. Patchy blowing snow before 9am. High near 20. Wind chill values as low as zero. West southwest wind 17 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Monday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 7. West southwest wind 7 to 15 mph, with gusts as high as 24 mph. New snow accumulation of around an inch possible.
Tuesday
Mostly sunny, with a high near 28. Southwest wind 8 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly cloudy, with a low around 17. Southwest wind around 11 mph, with gusts as high as 23 mph.
Wednesday
Partly sunny, with a high near 34. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Wednesday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 22.
Thursday
Snow. Cloudy, with a high near 27. Breezy.
Thursday Night
Snow likely. Mostly cloudy, with a low around 15. Windy.
Friday
A chance of snow. Partly sunny, with a high near 30. Breezy.
Friday Night
A chance of snow. Mostly cloudy, with a low around 22. Breezy.
Saturday
A slight chance of snow. Mostly sunny, with a high near 34.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW St Mary MT
 48.73°N 113.53°W (Elev. 6778 ft)
Last Update:
12:31 am MDT Mar 29, 2026
Forecast Valid:
3am MDT Mar 29, 2026-6pm MDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation