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 46%
Wind Speed NA 3 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 09 Apr 11:10 AM MDT
Extended Forecast for

St Mary MT

  • Today

    Today: Mostly sunny, with a high near 50. East wind around 5 mph becoming light and variable.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 31. South southwest wind 3 to 5 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 62. South wind 3 to 6 mph.

    High: 62 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39. South wind 3 to 6 mph.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of showers, mainly after noon. Partly sunny, with a high near 60. Calm wind becoming west southwest 5 to 8 mph in the afternoon.

    High: 60 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 36. West wind 6 to 8 mph, with gusts as high as 18 mph.

    Low: 36 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of rain showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 45. North wind 6 to 9 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 45 °F

    Chance
    Showers then
    Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. North northeast wind 5 to 7 mph.

    Low: 32 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: Rain and snow likely before noon, then a chance of rain. Mostly cloudy, with a high near 46.

    High: 46 °F

    Rain/Snow
    Likely then
    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 50. East wind around 5 mph becoming light and variable.
Tonight
Mostly clear, with a low around 31. South southwest wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 62. South wind 3 to 6 mph.
Friday Night
Mostly cloudy, with a low around 39. South wind 3 to 6 mph.
Saturday
A 50 percent chance of showers, mainly after noon. Partly sunny, with a high near 60. Calm wind becoming west southwest 5 to 8 mph in the afternoon.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 36. West wind 6 to 8 mph, with gusts as high as 18 mph.
Sunday
A chance of rain showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 45. North wind 6 to 9 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Sunday Night
Rain likely before midnight, then rain and snow likely. Mostly cloudy, with a low around 32. North northeast wind 5 to 7 mph.
Monday
Rain and snow likely before noon, then a chance of rain. Mostly cloudy, with a high near 46.
Monday Night
A slight chance of rain before midnight. Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 45.
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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:
11:01 am MDT Apr 9, 2026
Forecast Valid:
11am MDT Apr 9, 2026-6pm MDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation