NWS Forecast for: St Mary MT
Issued by: National Weather Service Great Falls, MT
Last Update: 10:58 am MDT Aug 21, 2019
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  • This
    Afternoon

    This Afternoon: Mostly sunny, with a high near 84. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Mostly Sunny


    High: 84 °F

  • Tonight

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 3am.  Increasing clouds, with a low around 51. South southwest wind 8 to 13 mph, with gusts as high as 24 mph.

    Mostly Clear
    then Chance
    Showers

    Low: 51 °F

  • Thursday

    Thursday: A chance of rain before noon, then a chance of showers and thunderstorms after noon.  Partly sunny, with a high near 67. West wind 7 to 15 mph, with gusts as high as 25 mph.  Chance of precipitation is 40%.

    Chance
    Showers

    High: 67 °F

  • Thursday
    Night

    Thursday Night: A 30 percent chance of rain before midnight.  Partly cloudy, with a low around 42. Southwest wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Chance Rain
    then Partly
    Cloudy

    Low: 42 °F

  • Friday

    Friday: Partly sunny, with a high near 69. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Partly Sunny


    High: 69 °F

  • Friday
    Night

    Friday Night: A 20 percent chance of rain before midnight.  Mostly cloudy, with a low around 44.

    Slight Chance
    Rain then
    Partly Cloudy

    Low: 44 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 69.

    Mostly Sunny


    High: 69 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 43.

    Partly Cloudy


    Low: 43 °F

  • Sunday

    Sunday: A chance of rain after noon.  Sunny, with a high near 65.

    Sunny then
    Chance Rain

    High: 65 °F

  • This Afternoon: Mostly sunny, with a high near 84. South southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Tonight: A 40 percent chance of showers and thunderstorms, mainly after 3am. Increasing clouds, with a low around 51. South southwest wind 8 to 13 mph, with gusts as high as 24 mph.

    Thursday: A chance of rain before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. West wind 7 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    Thursday Night: A 30 percent chance of rain before midnight. Partly cloudy, with a low around 42. Southwest wind 3 to 7 mph. Winds could gust as high as 20 mph.

    Friday: Partly sunny, with a high near 69. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Friday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 44.

    Saturday: Mostly sunny, with a high near 69.

    Saturday Night: Partly cloudy, with a low around 43.

    Sunday: A chance of rain after noon. Sunny, with a high near 65.

    Sunday Night: A slight chance of rain. Mostly clear, with a low around 41.

    Monday: A chance of rain. Sunny, with a high near 63.

    Monday Night: A chance of rain. Partly cloudy, with a low around 37.

    Tuesday: A chance of rain. Mostly sunny, with a high near 63.



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

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