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

14°F

-10°C

Humidity 80%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 8°F (-13°C)
Visibility NA
Last update 31 Mar 12:10 AM MDT
Extended Forecast for

St Mary MT

  • Overnight

    Overnight: Mostly clear, with a low around 9. Light south southeast wind.

    Low: 9 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. South southeast wind 3 to 6 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 25. South southeast wind around 6 mph becoming light and variable in the evening.

    Low: 25 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 47. Southwest wind 3 to 6 mph.

    High: 47 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. South wind around 6 mph becoming east after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 32 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: Snow. High near 38. North wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    High: 38 °F

    Snow

  • Thursday Night

    Thursday Night: Snow, mainly before midnight. Low around 26. North northwest wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 26 °F

    Snow then
    Chance Snow

  • Friday

    Friday: A chance of snow before 3pm, then a slight chance of rain and snow. Mostly sunny, with a high near 44. West southwest wind 6 to 9 mph, with gusts as high as 20 mph.

    High: 44 °F

    Chance Snow
    then Slight
    Chance
    Rain/Snow

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 9. Light south southeast wind.
Tuesday
Partly sunny, with a high near 40. South southeast wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 25. South southeast wind around 6 mph becoming light and variable in the evening.
Wednesday
Partly sunny, with a high near 47. Southwest wind 3 to 6 mph.
Wednesday Night
Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. South wind around 6 mph becoming east after midnight. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
Snow. High near 38. North wind 6 to 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Thursday Night
Snow, mainly before midnight. Low around 26. North northwest wind 6 to 9 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday
A chance of snow before 3pm, then a slight chance of rain and snow. Mostly sunny, with a high near 44. West southwest wind 6 to 9 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 47.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
A slight chance of rain. Partly sunny, with a high near 47.
Sunday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 32.
Monday
A slight chance of rain. Partly sunny, with a high near 52.
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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 Mar 31, 2026
Forecast Valid:
1am MDT Mar 31, 2026-6pm MDT Apr 6, 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