NWS Forecast for: St Mary MT
Issued by: National Weather Service Great Falls, MT
Last Update: 11:22 pm MDT Mar 25, 2023		Print

  • Overnight

    Overnight: A 30 percent chance of snow, mainly before 2am. Cloudy, with a low around 20. Light and variable wind becoming north northeast around 6 mph. Total nighttime snow accumulation of less than a half inch possible.

    Chance Snow

    Low: 20 °F

  • Sunday

    Sunday: A slight chance of snow before 7am, then a chance of snow after noon. Mostly cloudy, with a high near 35. North northeast wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Chance Snow

    High: 35 °F

  • Sunday
    Night

    Sunday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. North northeast wind 5 to 9 mph becoming calm after midnight. New snow accumulation of less than a half inch possible.

    Chance Snow

    Low: 15 °F

  • Monday

    Monday: A 50 percent chance of snow. Mostly cloudy, with a high near 35. Calm wind becoming north around 6 mph in the afternoon. New snow accumulation of around an inch possible.

    Chance Snow

    High: 35 °F

  • Monday
    Night

    Monday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. Southeast wind around 6 mph becoming calm in the evening. New snow accumulation of 1 to 2 inches possible.

    Chance Snow

    Low: 15 °F

  • Tuesday

    Tuesday: Partly sunny, with a high near 34. Calm wind becoming east 5 to 7 mph in the afternoon.

    Partly Sunny

    High: 34 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 13. East wind 5 to 7 mph becoming south after midnight.

    Partly Cloudy

    Low: 13 °F

  • Wednesday

    Wednesday: Sunny, with a high near 40. South wind 5 to 8 mph.

    Sunny

    High: 40 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 18.

    Partly Cloudy

    Low: 18 °F

    • Overnight: A 30 percent chance of snow, mainly before 2am. Cloudy, with a low around 20. Light and variable wind becoming north northeast around 6 mph. Total nighttime snow accumulation of less than a half inch possible.

    Sunday: A slight chance of snow before 7am, then a chance of snow after noon. Mostly cloudy, with a high near 35. North northeast wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Sunday Night: A 30 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. North northeast wind 5 to 9 mph becoming calm after midnight. New snow accumulation of less than a half inch possible.

    Monday: A 50 percent chance of snow. Mostly cloudy, with a high near 35. Calm wind becoming north around 6 mph in the afternoon. New snow accumulation of around an inch possible.

    Monday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 15. Southeast wind around 6 mph becoming calm in the evening. New snow accumulation of 1 to 2 inches possible.

    Tuesday: Partly sunny, with a high near 34. Calm wind becoming east 5 to 7 mph in the afternoon.

    Tuesday Night: Partly cloudy, with a low around 13. East wind 5 to 7 mph becoming south after midnight.

    Wednesday: Sunny, with a high near 40. South wind 5 to 8 mph.

    Wednesday Night: Partly cloudy, with a low around 18.

    Thursday: A chance of snow. Mostly cloudy, with a high near 36.

    Thursday Night: A slight chance of snow. Mostly cloudy, with a low around 20.

    Friday: Mostly sunny, with a high near 42.

    Friday Night: A chance of snow. Mostly cloudy, with a low around 27.

    Saturday: A chance of snow. Partly sunny, with a high near 41.


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

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