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

40°F

4°C

Humidity 66%
Wind Speed NA 12 MPH
Barometer NA
Dewpoint 29°F (-2°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 12 Apr 04:10 AM MDT
Extended Forecast for

St Mary MT

  • Overnight

    Overnight: A chance of rain and snow showers. Mostly cloudy, with a steady temperature around 39. West southwest wind around 5 mph becoming north. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 39 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: A chance of rain and snow, mainly before 9am. Mostly cloudy, with a high near 47. North northeast wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 47 °F

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: A slight chance of rain and snow, mainly between 2am and 3am. Mostly cloudy, with a low around 33. East northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 33 °F

    Slight Chance
    Rain then
    Slight Chance
    Rain/Snow

  • Monday

    Monday: A 50 percent chance of rain, mainly after noon. Partly sunny, with a high near 53. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.

    High: 53 °F

    Slight Chance
    Rain then
    Chance Rain

  • Monday Night

    Monday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36. West southwest wind 11 to 14 mph, with gusts as high as 30 mph.

    Low: 36 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. West southwest wind 15 to 20 mph, with gusts as high as 41 mph.

    High: 46 °F

    Partly Sunny

  • 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 15 to 18 mph, with gusts as high as 39 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: Snow likely, mainly before noon. Partly sunny, with a high near 43. West southwest wind 14 to 18 mph, with gusts as high as 39 mph.

    High: 43 °F

    Snow Likely

  • Wednesday Night

    Wednesday Night: A chance of snow. Mostly cloudy, with a low around 22.

    Low: 22 °F

    Chance Snow

Detailed Forecast

Overnight
A chance of rain and snow showers. Mostly cloudy, with a steady temperature around 39. West southwest wind around 5 mph becoming north. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday
A chance of rain and snow, mainly before 9am. Mostly cloudy, with a high near 47. North northeast wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday Night
A slight chance of rain and snow, mainly between 2am and 3am. Mostly cloudy, with a low around 33. East northeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
A 50 percent chance of rain, mainly after noon. Partly sunny, with a high near 53. Light and variable wind becoming west southwest 6 to 11 mph in the afternoon. Winds could gust as high as 22 mph.
Monday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 36. West southwest wind 11 to 14 mph, with gusts as high as 30 mph.
Tuesday
Partly sunny, with a high near 46. West southwest wind 15 to 20 mph, with gusts as high as 41 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 15 to 18 mph, with gusts as high as 39 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Wednesday
Snow likely, mainly before noon. Partly sunny, with a high near 43. West southwest wind 14 to 18 mph, with gusts as high as 39 mph.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 22.
Thursday
Snow likely, mainly before noon. Mostly cloudy, with a high near 37.
Thursday Night
A slight chance of snow. Partly cloudy, with a low around 23.
Friday
A slight chance of snow. Mostly sunny, with a high near 43.
Friday Night
A slight chance of snow. Partly cloudy, with a low around 26.
Saturday
Mostly sunny, with a high near 47.
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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:
3:26 am MDT Apr 12, 2026
Forecast Valid:
4am MDT Apr 12, 2026-6pm MDT Apr 18, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation