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

48°F

9°C

Humidity 52%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Wind Chill43°F (6°C)
Last update 13 Apr 02:10 PM MDT
Extended Forecast for

St Mary MT

  • This Afternoon

    This Afternoon: A 40 percent chance of rain, mainly after 5pm. Partly sunny, with a high near 52. Southwest wind 11 to 13 mph, with gusts as high as 26 mph.

    High: 52 °F

    Chance Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 3am. Mostly cloudy, with a low around 35. Southwest wind 14 to 17 mph, with gusts as high as 37 mph.

    Low: 35 °F

    Slight Chance
    Rain

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 45. Southwest wind 17 to 21 mph, with gusts as high as 43 mph.

    High: 45 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind around 21 mph, with gusts as high as 44 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 33 °F

    Slight Chance
    Rain/Snow
    then Chance
    Snow

  • Wednesday

    Wednesday: A 50 percent chance of snow. Partly sunny, with a high near 46. Southwest wind 15 to 18 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.

    High: 46 °F

    Chance Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 21. West southwest wind 11 to 13 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 21 °F

    Snow

  • Thursday

    Thursday: Snow. High near 32. North northwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 32 °F

    Snow

  • Thursday Night

    Thursday Night: A chance of snow before midnight. Mostly cloudy, with a low around 18. North northwest wind 5 to 8 mph becoming west southwest after midnight.

    Low: 18 °F

    Chance Snow
    then Partly
    Cloudy

  • Friday

    Friday: A chance of snow after noon. Mostly sunny, with a high near 43.

    High: 43 °F

    Mostly Sunny
    then Chance
    Snow

Detailed Forecast

This Afternoon
A 40 percent chance of rain, mainly after 5pm. Partly sunny, with a high near 52. Southwest wind 11 to 13 mph, with gusts as high as 26 mph.
Tonight
A 20 percent chance of rain before 3am. Mostly cloudy, with a low around 35. Southwest wind 14 to 17 mph, with gusts as high as 37 mph.
Tuesday
Mostly cloudy, with a high near 45. Southwest wind 17 to 21 mph, with gusts as high as 43 mph.
Tuesday Night
A slight chance of rain and snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 33. West southwest wind around 21 mph, with gusts as high as 44 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Wednesday
A 50 percent chance of snow. Partly sunny, with a high near 46. Southwest wind 15 to 18 mph, with gusts as high as 40 mph. New snow accumulation of less than a half inch possible.
Wednesday Night
Snow. Low around 21. West southwest wind 11 to 13 mph becoming northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Thursday
Snow. High near 32. North northwest wind around 10 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 chance of snow before midnight. Mostly cloudy, with a low around 18. North northwest wind 5 to 8 mph becoming west southwest after midnight.
Friday
A chance of snow after noon. Mostly sunny, with a high near 43.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Sunny, with a high near 49.
Saturday Night
Mostly cloudy, with a low around 33.
Sunday
Mostly sunny, with a high near 54.
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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 pm MDT Apr 13, 2026
Forecast Valid:
2pm MDT Apr 13, 2026-6pm MDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation