Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    40% Chance of Storms
    39°
    Monday 4/15
    Forecast night icon
    39°
    40% Chance of Storms
    Hourly
    Night Details
    Breezy colder. Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening then partly cloudy after midnight. Lows 40 to 45. West winds 10 to 15 mph increasing to 15 to 25 mph after midnight. Gusts up to 40 mph. Chance of precipitation 40 percent.
  • Forecast day icon
    Tuesday
    Windy
    53°
    Forecast night icon
    Night
    50% Chance of Snow
    29°
    Tuesday 4/16
    Day
    53°
    Windy
    Forecast day icon
    Night
    29°
    50% Chance of Snow
    Forecast night icon
    Hourly
    Day Details
    Windy. Sunny in the morning then becoming partly cloudy. Highs 55 to 60. West winds 20 to 30 mph.
    Night Details
    Breezy colder. Mostly cloudy. Chance of snow and slight chance of rain in the evening then chance of snow after midnight. Lows around 30. Northwest winds 15 to 25 mph. Chance of precipitation 50 percent.
  • Forecast day icon
    Wednesday
    50% Chance of Snow
    35°
    Forecast night icon
    Night
    Mostly Cloudy
    22°
    Wednesday 4/17
    Day
    35°
    50% Chance of Snow
    Forecast day icon
    Night
    22°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Windy colder. Patchy blowing snow in the morning. Mostly cloudy with a 50 percent chance of snow. Highs 35 to 40. Northwest winds 20 to 30 mph.
    Night Details
    Breezy. Mostly cloudy. A 20 percent chance of snow after midnight. Lows around 25. Northwest winds 15 to 25 mph decreasing to 10 to 15 mph after midnight.
  • Forecast day icon
    Thursday
    Windy
    35°
    Forecast night icon
    Night
    Partly Cloudy
    18°
    Thursday 4/18
    Day
    35°
    Windy
    Forecast day icon
    Night
    18°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Windy. Mostly cloudy with a 20 percent chance of snow. Highs around 40.
    Night Details
    Partly cloudy. Lows 20 to 25.
  • Forecast day icon
    Friday
    Mostly Cloudy
    33°
    Forecast night icon
    Night
    Partly Cloudy
    18°
    Friday 4/19
    Day
    33°
    Mostly Cloudy
    Forecast day icon
    Night
    18°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Highs 35 to 40.
    Night Details
    Partly cloudy. Lows 20 to 25.
  • Forecast day icon
    Saturday
    Mostly Sunny
    46°
    Forecast night icon
    Night
    Mostly Clear
    27°
    Saturday 4/20
    Day
    46°
    Mostly Sunny
    Forecast day icon
    Night
    27°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs 45 to 50. Lows 25 to 30.
    Night Details
    Mostly clear. Highs 45 to 50. Lows 25 to 30.
  • Forecast day icon
    Sunday
    Partly Cloudy
    55°
    Forecast night icon
    Night
    Partly Cloudy
    32°
    Sunday 4/21
    Day
    55°
    Partly Cloudy
    Forecast day icon
    Night
    32°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Highs 60 to 65. Lows 35 to 40.
    Night Details
    Partly cloudy. Highs 60 to 65. Lows 35 to 40.
  • Forecast day icon
    Monday
    Partly Cloudy
    51°
    Forecast night icon
    Night
    Partly Cloudy
    33°
    Monday 4/22
    Day
    51°
    Partly Cloudy
    Forecast day icon
    Night
    33°
    Partly Cloudy
    Forecast night icon
    Day Details
    Partly cloudy. Highs 60 to 65. Lows 35 to 40.
    Night Details
    Partly cloudy. Low temperature around 33F. Dew point will be around 26F with an average humidity of 59%. Winds will be 9 mph from the SW.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    56°
    Forecast night icon
    Night
    Mostly Cloudy
    35°
    Tuesday 4/23
    Day
    56°
    Mostly Sunny
    Forecast day icon
    Night
    35°
    Mostly Cloudy
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 56F. Dew point will be around 28F with an average humidity of 46%. Winds will be 10 mph from the W.
    Night Details
    Mostly cloudy. Low temperature around 35F. Dew point will be around 29F with an average humidity of 59%. Winds will be 7 mph from the SW.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    54°
    Forecast night icon
    Night
    Cloudy
    36°
    Wednesday 4/24
    Day
    54°
    Mostly Sunny
    Forecast day icon
    Night
    36°
    Cloudy
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 54F. Dew point will be around 32F with an average humidity of 53%. Winds will be 10 mph from the W.
    Night Details
    Cloudy. Low temperature around 36F. Dew point will be around 32F with an average humidity of 67%. Winds will be 7 mph from the NW.