NWS Forecast for: St Mary MT
Issued by: National Weather Service Great Falls, MT
Last Update: 8:11 pm MST Dec 12, 2019
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  • Tonight

    Tonight: A 40 percent chance of snow.  Cloudy, with a steady temperature around 25. Southwest wind 7 to 10 mph, with gusts as high as 25 mph.  Total nighttime snow accumulation of 1 to 3 inches possible.

    Chance Snow


    Low: 25 °F

  • Friday

    Friday: A 50 percent chance of snow, mainly before 11am.  Cloudy, then gradually becoming mostly sunny, with a high near 30. Southwest wind 6 to 9 mph, with gusts as high as 21 mph.  New snow accumulation of 1 to 2 inches possible.

    Chance Snow
    then Slight
    Chance Snow

    High: 30 °F

  • Friday
    Night

    Friday Night: A 20 percent chance of snow before 8pm.  Mostly cloudy, with a low around 18. West southwest wind 6 to 8 mph.

    Slight Chance
    Snow then
    Mostly Cloudy

    Low: 18 °F

  • Saturday

    Saturday: Mostly cloudy, with a high near 28. West southwest wind around 7 mph.

    Mostly Cloudy


    High: 28 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 15. West southwest wind around 8 mph.

    Mostly Cloudy


    Low: 15 °F

  • Sunday

    Sunday: Partly sunny, with a high near 25.

    Partly Sunny


    High: 25 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 14.

    Mostly Cloudy


    Low: 14 °F

  • Monday

    Monday: Partly sunny, with a high near 24.

    Partly Sunny


    High: 24 °F

  • Monday
    Night

    Monday Night: Mostly cloudy, with a low around 17.

    Mostly Cloudy


    Low: 17 °F



  • Tonight: A 40 percent chance of snow. Cloudy, with a steady temperature around 25. Southwest wind 7 to 10 mph, with gusts as high as 25 mph. Total nighttime snow accumulation of 1 to 3 inches possible.

    Friday: A 50 percent chance of snow, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 30. Southwest wind 6 to 9 mph, with gusts as high as 21 mph. New snow accumulation of 1 to 2 inches possible.

    Friday Night: A 20 percent chance of snow before 8pm. Mostly cloudy, with a low around 18. West southwest wind 6 to 8 mph.

    Saturday: Mostly cloudy, with a high near 28. West southwest wind around 7 mph.

    Saturday Night: Mostly cloudy, with a low around 15. West southwest wind around 8 mph.

    Sunday: Partly sunny, with a high near 25.

    Sunday Night: Mostly cloudy, with a low around 14.

    Monday: Partly sunny, with a high near 24.

    Monday Night: Mostly cloudy, with a low around 17.

    Tuesday: Partly sunny, with a high near 29.

    Tuesday Night: Mostly cloudy, with a low around 22.

    Wednesday: Mostly cloudy, with a high near 31.

    Wednesday Night: Mostly cloudy, with a low around 21.

    Thursday: A slight chance of snow. Mostly cloudy, with a high near 32.



    St Mary MT
     48.76°N 113.44°W (Elev. 4741 ft)

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