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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 47.07°N 109.43°W (Text-Only)
NWS Forecast for: Lewistown MT
Issued by: National Weather Service Great Falls, MT
Last Update: 9:17 pm MST Dec 4, 2025		Print

  • Overnight

    Overnight: Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. West wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 21 °F

    Snow Likely


  • Friday

    Friday: A chance of snow before 11am, then a slight chance of snow after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 35. West wind 5 to 7 mph becoming light and variable. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 35 °F

    Chance Snow


  • Friday
    Night

    Friday Night: Snow, mainly after 8pm. Low around 19. Southeast wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 19 °F

    Snow


  • Saturday

    Saturday: Snow likely, mainly before 11am. Cloudy, with a high near 33. West northwest wind 3 to 8 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 33 °F

    Snow Likely
    then Chance
    Snow

  • Saturday
    Night

    Saturday Night: A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 20. West southwest wind 5 to 11 mph, with gusts as high as 21 mph. New snow accumulation of less than a half inch possible.

    Low: 20 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40. West wind around 11 mph, with gusts as high as 22 mph.

    High: 40 °F

    Partly Sunny


  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 27. West southwest wind 14 to 18 mph, with gusts as high as 31 mph.

    Low: 27 °F

    Mostly Cloudy


  • Monday

    Monday: Mostly sunny, with a high near 41. West wind 14 to 18 mph, with gusts as high as 32 mph.

    High: 41 °F

    Mostly Sunny


  • Monday
    Night

    Monday Night: A slight chance of rain and snow after 11pm. Mostly cloudy, with a low around 28.

    Low: 28 °F

    Slight Chance
    Rain/Snow

    • Overnight: Snow likely, mainly before 1am. Mostly cloudy, with a low around 21. West wind around 10 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of less than a half inch possible.

    Friday: A chance of snow before 11am, then a slight chance of snow after 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 35. West wind 5 to 7 mph becoming light and variable. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Friday Night: Snow, mainly after 8pm. Low around 19. Southeast wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Saturday: Snow likely, mainly before 11am. Cloudy, with a high near 33. West northwest wind 3 to 8 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    Saturday Night: A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 20. West southwest wind 5 to 11 mph, with gusts as high as 21 mph. New snow accumulation of less than a half inch possible.

    Sunday: Partly sunny, with a high near 40. West wind around 11 mph, with gusts as high as 22 mph.

    Sunday Night: Mostly cloudy, with a low around 27. West southwest wind 14 to 18 mph, with gusts as high as 31 mph.

    Monday: Mostly sunny, with a high near 41. West wind 14 to 18 mph, with gusts as high as 32 mph.

    Monday Night: A slight chance of rain and snow after 11pm. Mostly cloudy, with a low around 28.

    Tuesday: A chance of rain before 2pm, then a chance of rain and snow. Mostly cloudy, with a high near 46. Breezy.

    Tuesday Night: Rain and snow likely. Mostly cloudy, with a low around 25.

    Wednesday: A chance of rain and snow. Partly sunny, with a high near 40.

    Wednesday Night: A chance of rain and snow. Mostly cloudy, with a low around 24.

    Thursday: A chance of snow. Mostly cloudy, with a high near 42.


    Lewistown MT
     47.07°N 109.43°W (Elev. 3898 ft)

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