7-Day Forecast 48.74°N 113.44°W (Text-Only)
NWS Forecast for: St Mary MT
Issued by: National Weather Service Great Falls, MT
Last Update: 8:28 pm MDT Jul 12, 2025
Print


  • Tonight

    Tonight: Mostly clear, with a low around 56. South wind 5 to 8 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear


  • Sunday

    Sunday: Mostly sunny, with a high near 84. West southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    High: 84 °F

    Mostly Sunny


  • Sunday
    Night

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Partly cloudy, with a low around 54. West southwest wind 5 to 9 mph becoming light southwest  after midnight. Winds could gust as high as 21 mph.  Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: A 50 percent chance of showers after noon.  Partly sunny, with a high near 72. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 23 mph.

    High: 72 °F

    Mostly Sunny
    then Chance
    Showers

  • Monday
    Night

    Monday Night: Showers and possibly a thunderstorm before midnight, then showers likely.  Low around 44. North northeast wind around 10 mph, with gusts as high as 22 mph.  Chance of precipitation is 80%.

    Low: 44 °F

    Showers


  • Tuesday

    Tuesday: Showers likely.  Cloudy, with a high near 56. Northeast wind around 10 mph, with gusts as high as 21 mph.  Chance of precipitation is 60%.

    High: 56 °F

    Showers
    Likely

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 42. East northeast wind 5 to 9 mph becoming light northeast  after midnight.

    Low: 42 °F

    Chance
    Showers then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. Light and variable wind becoming east 5 to 7 mph in the afternoon.

    High: 66 °F

    Mostly Sunny


  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy


  • Tonight: Mostly clear, with a low around 56. South wind 5 to 8 mph, with gusts as high as 20 mph.

    Sunday: Mostly sunny, with a high near 84. West southwest wind 5 to 10 mph, with gusts as high as 21 mph.

    Sunday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 54. West southwest wind 5 to 9 mph becoming light southwest after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 20%.

    Monday: A 50 percent chance of showers after noon. Partly sunny, with a high near 72. Light and variable wind becoming north 6 to 11 mph in the morning. Winds could gust as high as 23 mph.

    Monday Night: Showers and possibly a thunderstorm before midnight, then showers likely. Low around 44. North northeast wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Tuesday: Showers likely. Cloudy, with a high near 56. Northeast wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Tuesday Night: A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 42. East northeast wind 5 to 9 mph becoming light northeast after midnight.

    Wednesday: Mostly sunny, with a high near 66. Light and variable wind becoming east 5 to 7 mph in the afternoon.

    Wednesday Night: Partly cloudy, with a low around 45.

    Thursday: Mostly sunny, with a high near 72.

    Thursday Night: Mostly cloudy, with a low around 49.

    Friday: Mostly sunny, with a high near 76.

    Friday Night: Partly cloudy, with a low around 51.

    Saturday: Sunny, with a high near 79.



    St Mary MT
     48.74°N 113.44°W (Elev. 4554 ft)

    Visit your local NWS office at: https://www.weather.gov/tfx