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

Hazardous Weather Conditions

Current conditions at

ST. MARY (SRYM8)

Lat: 48.74108°NLon: 113.43289°WElev: 4557.0ft.

NA

2°C

35°F

Humidity 62%
Wind Speed SSW 14 MPH
Barometer NA
Dewpoint -5°C (23°F)
Visibility NA
Wind Chill-3°C (26°F)
Last update 04 Dec 01:11 PM MST
Extended Forecast for

St Mary MT

Winter Storm Watch December 5, 05:00pm until December 7, 08:00am
Click here for hazard details and duration
Winter Storm Watch

  • This Afternoon

    This Afternoon: A 20 percent chance of snow before 2pm. Partly sunny, with a high near 1. West southwest wind 23 to 26 km/h, with gusts as high as 50 km/h.

    High: 1 °C

    Slight Chance
    Snow

  • Tonight

    Tonight: Mostly cloudy, with a low around -6. West southwest wind 10 to 18 km/h, with gusts as high as 40 km/h.

    Low: -6 °C

    Mostly Cloudy

  • Friday

    Friday: Snow, mainly after 11am. High near 1. Southwest wind 11 to 16 km/h, with gusts as high as 35 km/h. Chance of precipitation is 80%. New snow accumulation of less than one centimeter possible.

    High: 1 °C

    Snow

  • Friday Night

    Friday Night: Snow. Low around -9. West wind around 11 km/h. Chance of precipitation is 90%. New snow accumulation of 3 to 5 centimeters possible.

    Low: -9 °C

    Snow

  • Saturday

    Saturday: Snow likely. Mostly cloudy, with a high near 2. West southwest wind 8 to 14 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New snow accumulation of less than one centimeter possible.

    High: 2 °C

    Snow Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around -2. West southwest wind 16 to 23 km/h, with gusts as high as 47 km/h. New snow accumulation of less than one centimeter possible.

    Low: -2 °C

    Chance Snow

  • Sunday

    Sunday: A 40 percent chance of snow, mainly after 11am. Mostly cloudy, with a high near 4. West southwest wind 21 to 24 km/h, with gusts as high as 50 km/h. New snow accumulation of less than a half centimeter possible.

    High: 4 °C

    Chance Snow

  • Sunday Night

    Sunday Night: A chance of snow. Mostly cloudy, with a low around 0. West southwest wind 23 to 27 km/h, with gusts as high as 65 km/h.

    Low: 0 °C

    Chance Snow

  • Monday

    Monday: A chance of snow, mainly after 11am. Partly sunny, with a high near 4.

    High: 4 °C

    Chance Snow

Detailed Forecast

This Afternoon
A 20 percent chance of snow before 2pm. Partly sunny, with a high near 1. West southwest wind 23 to 26 km/h, with gusts as high as 50 km/h.
Tonight
Mostly cloudy, with a low around -6. West southwest wind 10 to 18 km/h, with gusts as high as 40 km/h.
Friday
Snow, mainly after 11am. High near 1. Southwest wind 11 to 16 km/h, with gusts as high as 35 km/h. Chance of precipitation is 80%. New snow accumulation of less than one centimeter possible.
Friday Night
Snow. Low around -9. West wind around 11 km/h. Chance of precipitation is 90%. New snow accumulation of 3 to 5 centimeters possible.
Saturday
Snow likely. Mostly cloudy, with a high near 2. West southwest wind 8 to 14 km/h, with gusts as high as 32 km/h. Chance of precipitation is 70%. New snow accumulation of less than one centimeter possible.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around -2. West southwest wind 16 to 23 km/h, with gusts as high as 47 km/h. New snow accumulation of less than one centimeter possible.
Sunday
A 40 percent chance of snow, mainly after 11am. Mostly cloudy, with a high near 4. West southwest wind 21 to 24 km/h, with gusts as high as 50 km/h. New snow accumulation of less than a half centimeter possible.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 0. West southwest wind 23 to 27 km/h, with gusts as high as 65 km/h.
Monday
A chance of snow, mainly after 11am. Partly sunny, with a high near 4.
Monday Night
A chance of snow before 8pm, then rain likely, possibly mixed with snow. Mostly cloudy, with a low around -1.
Tuesday
Rain and snow. Mostly cloudy, with a high near 4.
Tuesday Night
Snow likely. Mostly cloudy, with a low around -4.
Wednesday
Snow likely. Mostly cloudy, with a high near 2.
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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 m)
Last Update:
9:22 am MST Dec 4, 2025
Forecast Valid:
1pm MST Dec 4, 2025-6pm MST Dec 10, 2025
 
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