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

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

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

NA

41°F

5°C

Humidity 73%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 33°F (1°C)
Visibility NA
Wind Chill34°F (1°C)
Last update 14 Apr 01:10 AM MDT
Extended Forecast for

St Mary MT

  • Overnight

    Overnight: A 20 percent chance of rain before 3am. Mostly cloudy, with a steady temperature around 39. Southwest wind 14 to 16 mph, with gusts as high as 34 mph.

    Low: 39 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: A slight chance of rain, mixing with snow after 2pm, then gradually ending. Partly sunny, with a high near 45. Windy, with a southwest wind 29 to 33 mph, with gusts as high as 50 mph. Chance of precipitation is 20%.

    High: 45 °F

    Windy. Slight
    Chance Rain
    then Slight
    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 32. Windy, with a southwest wind 32 to 37 mph, with gusts as high as 55 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

    Low: 32 °F

    Windy. Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: Snow likely, mainly after noon. Mostly cloudy, with a high near 46. Windy, with a southwest wind 23 to 32 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 46 °F

    Snow Likely
    and Windy

  • Wednesday Night

    Wednesday Night: Snow. Low around 22. Breezy, with a southwest wind 15 to 22 mph becoming north northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 22 °F

    Snow and
    Breezy

  • Thursday

    Thursday: Snow. High near 31. North northwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 31 °F

    Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 16. Northwest wind 5 to 7 mph becoming west southwest after midnight. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: A chance of snow, mainly after noon. Partly sunny, with a high near 40. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.

    High: 40 °F

    Chance Snow

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of rain before 3am. Mostly cloudy, with a steady temperature around 39. Southwest wind 14 to 16 mph, with gusts as high as 34 mph.
Tuesday
A slight chance of rain, mixing with snow after 2pm, then gradually ending. Partly sunny, with a high near 45. Windy, with a southwest wind 29 to 33 mph, with gusts as high as 50 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 32. Windy, with a southwest wind 32 to 37 mph, with gusts as high as 55 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.
Wednesday
Snow likely, mainly after noon. Mostly cloudy, with a high near 46. Windy, with a southwest wind 23 to 32 mph, with gusts as high as 45 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow. Low around 22. Breezy, with a southwest wind 15 to 22 mph becoming north northwest after midnight. Winds could gust as high as 31 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow. High near 31. North northwest wind 8 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Thursday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 16. Northwest wind 5 to 7 mph becoming west southwest after midnight. New snow accumulation of less than a half inch possible.
Friday
A chance of snow, mainly after noon. Partly sunny, with a high near 40. West southwest wind 6 to 9 mph, with gusts as high as 18 mph.
Friday Night
Partly cloudy, with a low around 24.
Saturday
Sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 32.
Sunday
Mostly sunny, with a high near 58.
Sunday Night
Partly cloudy, with a low around 38.
Monday
A slight chance of rain and snow. Partly sunny, with a high near 60.
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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:
12:31 am MDT Apr 14, 2026
Forecast Valid:
1am MDT Apr 14, 2026-6pm MDT Apr 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