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

Critical Fire Weather in the Southern Plains; Severe Storms in the Ohio Valley

Strong winds and low humidity will create elevated to critical fire weather conditions across the Southern Plains on Thursday. Strong to severe thunderstorms are forecast in the Ohio Valley late Thursday into Friday morning, with the strongest storms capable of producing very large hail, damaging winds, and a few tornadoes. Read More >

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

43°F

6°C

Humidity 30%
Wind Speed NA 5 MPH
Barometer NA
Dewpoint 13°F (-11°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 25 Mar 06:10 PM MDT
Extended Forecast for

St Mary MT

  • Tonight

    Tonight: A 50 percent chance of snow, mainly between 10pm and 5am. The snow could be heavy at times. Mostly cloudy, with a low around 25. Southwest wind 7 to 16 mph, with gusts as high as 29 mph. Total nighttime snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Slight Chance
    Snow then
    Heavy Snow

  • Thursday

    Thursday: A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37. West southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. New snow accumulation of less than a half inch possible.

    High: 37 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 19. West southwest wind 8 to 18 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 45. Southwest wind around 8 mph.

    High: 45 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31. Southwest wind 5 to 7 mph, with gusts as high as 18 mph.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 52. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35. West southwest wind 6 to 9 mph, with gusts as high as 22 mph.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 51. West southwest wind 7 to 11 mph, with gusts as high as 26 mph.

    High: 51 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
A 50 percent chance of snow, mainly between 10pm and 5am. The snow could be heavy at times. Mostly cloudy, with a low around 25. Southwest wind 7 to 16 mph, with gusts as high as 29 mph. Total nighttime snow accumulation of 1 to 3 inches possible.
Thursday
A 30 percent chance of snow after 1pm. Partly sunny, with a high near 37. West southwest wind 9 to 14 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 28 mph. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly clear, with a low around 19. West southwest wind 8 to 18 mph, with gusts as high as 25 mph.
Friday
Mostly sunny, with a high near 45. Southwest wind around 8 mph.
Friday Night
Partly cloudy, with a low around 31. Southwest wind 5 to 7 mph, with gusts as high as 18 mph.
Saturday
Mostly sunny, with a high near 52. Southwest wind 6 to 10 mph, with gusts as high as 23 mph.
Saturday Night
Partly cloudy, with a low around 35. West southwest wind 6 to 9 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 51. West southwest wind 7 to 11 mph, with gusts as high as 26 mph.
Sunday Night
A slight chance of rain before 9pm, then a chance of rain and snow. Mostly cloudy, with a low around 35.
Monday
A chance of snow before 9am, then a chance of rain and snow between 9am and noon, then a chance of rain after noon. Partly sunny, with a high near 47.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 26.
Tuesday
A chance of snow. Mostly cloudy, with a high near 41.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 24.
Wednesday
A chance of snow. Mostly cloudy, with a high near 40.
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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:
6:41 pm MDT Mar 25, 2026
Forecast Valid:
6pm MDT Mar 25, 2026-6pm MDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation