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

38°F

3°C

Humidity 51%
Wind Speed NA 0 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 11 Apr 12:10 AM MDT
Extended Forecast for

St Mary MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 39. Light south southwest wind.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of rain, mainly after 1pm. Partly sunny, with a high near 59. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 59 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday Night

    Saturday Night: A chance of showers before 8pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 36. Southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

    Low: 36 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of rain showers before noon, then a slight chance of rain and snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Mostly cloudy, with a high near 48. South southwest wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 48 °F

    Chance
    Showers then
    Slight Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: A chance of rain before 3am, then a chance of rain and snow. Mostly cloudy, with a low around 34. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 34 °F

    Slight Chance
    Rain then
    Chance
    Rain/Snow

  • Monday

    Monday: Rain likely, mainly after noon. Partly sunny, with a high near 53. Light west southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 60%.

    High: 53 °F

    Rain Likely

  • Monday Night

    Monday Night: A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 37. West southwest wind 11 to 14 mph, with gusts as high as 29 mph.

    Low: 37 °F

    Chance Rain
    then Mostly
    Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 45. West southwest wind 15 to 20 mph, with gusts as high as 41 mph.

    High: 45 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow after midnight. Mostly cloudy, with a low around 33.

    Low: 33 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 39. Light south southwest wind.
Saturday
A 40 percent chance of rain, mainly after 1pm. Partly sunny, with a high near 59. Light south southwest wind becoming southwest 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Saturday Night
A chance of showers before 8pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 36. Southwest wind 6 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.
Sunday
A chance of rain showers before noon, then a slight chance of rain and snow showers between noon and 3pm, then a slight chance of rain showers after 3pm. Mostly cloudy, with a high near 48. South southwest wind around 6 mph becoming northeast in the afternoon. Chance of precipitation is 40%. Little or no snow accumulation expected.
Sunday Night
A chance of rain before 3am, then a chance of rain and snow. Mostly cloudy, with a low around 34. East northeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday
Rain likely, mainly after noon. Partly sunny, with a high near 53. Light west southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 60%.
Monday Night
A 30 percent chance of rain before midnight. Mostly cloudy, with a low around 37. West southwest wind 11 to 14 mph, with gusts as high as 29 mph.
Tuesday
Partly sunny, with a high near 45. West southwest wind 15 to 20 mph, with gusts as high as 41 mph.
Tuesday Night
A chance of snow after midnight. Mostly cloudy, with a low around 33.
Wednesday
Snow likely, mainly before noon. Mostly cloudy, with a high near 43.
Wednesday Night
A chance of snow. Mostly cloudy, with a low around 24.
Thursday
A chance of snow. Partly sunny, with a high near 38.
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 42.
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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:
12:32 am MDT Apr 11, 2026
Forecast Valid:
12am MDT Apr 11, 2026-6pm MDT Apr 17, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation