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

24°F

-4°C

Humidity 66%
Wind Speed NA 2 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Last update 13 Mar 06:10 PM MDT
Extended Forecast for

St Mary MT

Winter Storm Warning March 13, 06:40pm until March 14, 06:00pm
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning March 13, 06:40pm until March 14, 06:00pm

    NOW until 6:00pm Sat

    Winter Storm Warning

  • Tonight

    Low: 17 °F

    Snow

  • Saturday

    Saturday: Snow, mainly before 4pm. Temperature falling to around 16 by 5pm. Light north northeast wind becoming north 11 to 16 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    High: 24 °F⇓

    Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5. Wind chill values as low as -5. North wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph. New snow accumulation of less than a half inch possible.

    Low: 5 °F

    Chance Snow
    then Slight
    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 30. Wind chill values as low as zero. West southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 30 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 21. Southwest wind 9 to 14 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.

    Low: 21 °F

    Chance Snow

  • Monday

    Monday: A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 43. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 46 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 43 °F

    Chance Snow
    then Chance
    Rain/Snow and
    Breezy

  • Monday Night

    Monday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 39. Breezy, with a west southwest wind 23 to 26 mph, with gusts as high as 55 mph.

    Low: 39 °F

    Chance Rain
    and Breezy

  • Tuesday

    Tuesday: A slight chance of rain. Partly sunny, with a high near 50. Breezy, with a west southwest wind 25 to 29 mph, with gusts as high as 55 mph.

    High: 50 °F

    Slight Chance
    Rain and
    Breezy

Detailed Forecast

Tonight
Snow. Low around 17. East southeast wind 3 to 6 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of 1 to 3 inches possible.
Saturday
Snow, mainly before 4pm. Temperature falling to around 16 by 5pm. Light north northeast wind becoming north 11 to 16 mph in the morning. Winds could gust as high as 28 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Saturday Night
A 50 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 5. Wind chill values as low as -5. North wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph. New snow accumulation of less than a half inch possible.
Sunday
Partly sunny, with a high near 30. Wind chill values as low as zero. West southwest wind 5 to 10 mph, with gusts as high as 21 mph.
Sunday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a low around 21. Southwest wind 9 to 14 mph, with gusts as high as 28 mph. Little or no snow accumulation expected.
Monday
A chance of snow before noon, then a chance of rain and snow. Mostly cloudy, with a high near 43. Breezy, with a west southwest wind 16 to 23 mph, with gusts as high as 46 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 39. Breezy, with a west southwest wind 23 to 26 mph, with gusts as high as 55 mph.
Tuesday
A slight chance of rain. Partly sunny, with a high near 50. Breezy, with a west southwest wind 25 to 29 mph, with gusts as high as 55 mph.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 42. Breezy.
Wednesday
A slight chance of rain. Partly sunny, with a high near 51. Breezy.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Thursday
A slight chance of rain. Partly sunny, with a high near 54. Breezy.
Thursday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Friday
A slight chance of rain. Partly sunny, with a high near 55.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St Mary MT
 48.74°N 113.44°W (Elev. 4554 ft)
Last Update:
5:02 pm MDT Mar 13, 2026
Forecast Valid:
6pm MDT Mar 13, 2026-6pm MDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation