Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    20°
    Thursday 4/18
    Forecast night icon
    20°
    Partly Cloudy
    Hourly
    Night Details
    Partly cloudy. Low temperature around 20F. Dew point will be around 13F with an average humidity of 60%. Winds will be 9 mph from the NW.
  • Forecast day icon
    Friday
    Mostly Cloudy
    33°
    Forecast night icon
    Night
    Partly Cloudy
    21°
    Friday 4/19
    Day
    33°
    Mostly Cloudy
    Forecast day icon
    Night
    21°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Highs 35 to 40. Northwest winds 10 to 15 mph.
    Night Details
    Mostly cloudy in the evening then becoming partly cloudy. Lows 20 to 25. North winds 5 to 10 mph shifting to the southeast after midnight.
  • Forecast day icon
    Saturday
    Sunny
    44°
    Forecast night icon
    Night
    Mostly Clear
    28°
    Saturday 4/20
    Day
    44°
    Sunny
    Forecast day icon
    Night
    28°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Not as cool. Sunny. Highs 45 to 50. Southeast winds 5 to 10 mph.
    Night Details
    Mostly clear. Lows around 30. Southeast winds 5 to 15 mph.
  • Forecast day icon
    Sunday
    Partly Cloudy
    56°
    Forecast night icon
    Night
    Windy
    32°
    Sunday 4/21
    Day
    56°
    Partly Cloudy
    Forecast day icon
    Night
    32°
    Windy
    Forecast night icon
    Hourly
    Day Details
    Breezy. Not as cool. Partly cloudy in the morning then becoming mostly cloudy. Highs around 60. South winds 5 to 15 mph increasing to west 15 to 25 mph in the afternoon.
    Night Details
    Windy. Partly cloudy with a 20 percent chance of rain. Lows 35 to 40.
  • Forecast day icon
    Monday
    40% Chance of Rain
    50°
    Forecast night icon
    Night
    Partly Cloudy
    29°
    Monday 4/22
    Day
    50°
    40% Chance of Rain
    Forecast day icon
    Night
    29°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Windy. Mostly cloudy with a 40 percent chance of rain. Highs 50 to 55.
    Night Details
    Partly cloudy. Lows 30 to 35.
  • Forecast day icon
    Tuesday
    Sunny
    54°
    Forecast night icon
    Night
    Partly Cloudy
    34°
    Tuesday 4/23
    Day
    54°
    Sunny
    Forecast day icon
    Night
    34°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Warmer sunny. Highs 60 to 65.
    Night Details
    Partly cloudy. Lows 35 to 40. Highs 65 to 70.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    67°
    Forecast night icon
    Night
    Mostly Cloudy
    44°
    Wednesday 4/24
    Day
    67°
    Partly Cloudy
    Forecast day icon
    Night
    44°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Lows 35 to 40. Highs 65 to 70.
    Night Details
    Mostly cloudy with a 20 percent chance of rain. Lows 40 to 45.
  • Forecast day icon
    Thursday
    50% Chance of Rain
    64°
    Forecast night icon
    Night
    30% Chance of Rain
    40°
    Thursday 4/25
    Day
    64°
    50% Chance of Rain
    Forecast day icon
    Night
    40°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Mostly cloudy with a 50 percent chance of rain. Highs 60 to 70.
    Night Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 40F. Dew point will be around 36F with an average humidity of 71%. Winds will be 5 mph from the W.
  • Forecast day icon
    Friday
    50% Chance of Rain
    53°
    Forecast night icon
    Night
    40% Chance of Rain
    37°
    Friday 4/26
    Day
    53°
    50% Chance of Rain
    Forecast day icon
    Night
    37°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 45%. High temperature around 53F. Dew point will be around 39F with an average humidity of 69%. Winds will be 3 mph from the NE.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 37F. Dew point will be around 38F with an average humidity of 84%. Winds will be 2 mph from the N.
  • Forecast day icon
    Saturday
    50% Chance of Rain
    53°
    Forecast night icon
    Night
    40% Chance of Rain
    37°
    Saturday 4/27
    Day
    53°
    50% Chance of Rain
    Forecast day icon
    Night
    37°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 45%. High temperature around 53F. Dew point will be around 38F with an average humidity of 68%. Winds will be 3 mph from the NW.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 37F. Dew point will be around 36F with an average humidity of 79%. Winds will be 3 mph from the SW.
  • Forecast day icon
    Sunday
    50% Chance of Rain
    55°
    Forecast night icon
    Night
    40% Chance of Rain
    36°
    Sunday 4/28
    Day
    55°
    50% Chance of Rain
    Forecast day icon
    Night
    36°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a chance of rain. Chance of precipitation 45%. High temperature around 55F. Dew point will be around 38F with an average humidity of 64%. Winds will be 5 mph from the NW.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 35%. Low temperature around 36F. Dew point will be around 35F with an average humidity of 74%. Winds will be 4 mph from the SW.