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

71°F

22°C

Humidity 29%
Wind Speed NA 8 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 20 Jun 01:10 PM MDT
Extended Forecast for

St Mary MT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 76. Southwest wind around 11 mph, with gusts as high as 23 mph.

    High: 76 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers between 11pm and midnight. Partly cloudy, with a low around 44. West southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 44 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 65. Calm wind becoming north northwest around 6 mph in the afternoon. Chance of precipitation is 70%.

    High: 65 °F

    Mostly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms likely before 3am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.

    Low: 41 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday

    Monday: A 40 percent chance of showers. Partly sunny, with a high near 61. Calm wind becoming north 5 to 8 mph in the morning.

    High: 61 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40. North wind around 6 mph becoming calm in the evening.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 72. Calm wind becoming east around 6 mph in the afternoon.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 46. East southeast wind around 6 mph becoming calm in the evening.

    Low: 46 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 76. Southwest wind around 11 mph, with gusts as high as 23 mph.
Tonight
A 20 percent chance of showers between 11pm and midnight. Partly cloudy, with a low around 44. West southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 65. Calm wind becoming north northwest around 6 mph in the afternoon. Chance of precipitation is 70%.
Sunday Night
Showers and thunderstorms likely before 3am, then a slight chance of showers after 5am. Mostly cloudy, with a low around 41. North northwest wind around 5 mph becoming calm after midnight. Chance of precipitation is 70%.
Monday
A 40 percent chance of showers. Partly sunny, with a high near 61. Calm wind becoming north 5 to 8 mph in the morning.
Monday Night
Partly cloudy, with a low around 40. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 72. Calm wind becoming east around 6 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 46. East southeast wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Mostly sunny, with a high near 80.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 75.
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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:
12:32 pm MDT Jun 20, 2026
Forecast Valid:
1pm MDT Jun 20, 2026-6pm MDT Jun 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation