Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Sunday
    Partly Cloudy
    56°
    Forecast night icon
    Night
    Partly Cloudy
    40°
    Sunday 4/28
    Day
    56°
    Partly Cloudy
    Forecast day icon
    Night
    40°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy early in the morning then becoming partly cloudy. Highs 60 to 65. West winds 10 to 15 mph.
    Night Details
    Partly cloudy in the evening then becoming mostly cloudy. Lows around 40. West winds 5 to 15 mph.
  • Forecast day icon
    Monday
    Thunderstorms
    52°
    Forecast night icon
    Night
    70% Chance of Storms
    29°
    Monday 4/29
    Day
    52°
    Thunderstorms
    Forecast day icon
    Night
    29°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Slight chance of rain in the morning then rain showers and slight chance of thunderstorms in the afternoon. Highs 55 to 60. West winds 5 to 15 mph. Chance of precipitation near 100 percent.
    Night Details
    Breezy colder. Mostly cloudy. Rain showers likely and slight chance of thunderstorms in the evening. Lows 30 to 35. Northwest winds 10 to 15 mph shifting to the west 15 to 25 mph after midnight. Gusts up to 40 mph. Chance of precipitation 70 percent.
  • Forecast day icon
    Tuesday
    Windy
    49°
    Forecast night icon
    Night
    Windy
    30°
    Tuesday 4/30
    Day
    49°
    Windy
    Forecast day icon
    Night
    30°
    Windy
    Forecast night icon
    Hourly
    Day Details
    Windy. Sunny in the morning then partly cloudy with a 20 percent chance of rain and snow in the afternoon. Highs 50 to 55. West winds 25 to 35 mph.
    Night Details
    Windy. Mostly cloudy with a 20 percent chance of rain showers and snow showers. Lows 30 to 35.
  • Forecast day icon
    Wednesday
    50% Chance Frozen Mix
    45°
    Forecast night icon
    Night
    50% Chance Frozen Mix
    31°
    Wednesday 5/1
    Day
    45°
    50% Chance Frozen Mix
    Forecast day icon
    Night
    31°
    50% Chance Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Breezy colder. Mostly cloudy with a 50 percent chance of snow showers and rain showers. Highs 40 to 45. Lows 30 to 35.
    Night Details
    Breezy colder. Mostly cloudy with a 50 percent chance of snow showers and rain showers. Highs 40 to 45. Lows 30 to 35.
  • Forecast day icon
    Thursday
    50% Chance Frozen Mix
    52°
    Forecast night icon
    Night
    Mostly Cloudy
    33°
    Thursday 5/2
    Day
    52°
    50% Chance Frozen Mix
    Forecast day icon
    Night
    33°
    Mostly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Not as cool. Mostly cloudy with a 50 percent chance of rain showers and snow showers. Highs 50 to 55.
    Night Details
    Mostly cloudy with a 20 percent chance of rain showers. Lows 30 to 35.
  • Forecast day icon
    Friday
    50% Chance Rain Showers
    49°
    Forecast night icon
    Night
    40% Chance Rain Showers
    33°
    Friday 5/3
    Day
    49°
    50% Chance Rain Showers
    Forecast day icon
    Night
    33°
    40% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a 50 percent chance of rain showers. Highs 50 to 55.
    Night Details
    Mostly cloudy with a 40 percent chance of rain showers. Lows 30 to 35.
  • Forecast day icon
    Saturday
    Partly Cloudy
    60°
    Forecast night icon
    Night
    Cloudy
    37°
    Saturday 5/4
    Day
    60°
    Partly Cloudy
    Forecast day icon
    Night
    37°
    Cloudy
    Forecast night icon
    Day Details
    Partly cloudy with a 20 percent chance of rain showers. Highs 55 to 60.
    Night Details
    Cloudy. Low temperature around 37F. Dew point will be around 33F with an average humidity of 66%. Winds will be 6 mph from the SE.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    60°
    Forecast night icon
    Night
    30% Chance of Rain
    39°
    Sunday 5/5
    Day
    60°
    30% Chance of Rain
    Forecast day icon
    Night
    39°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 60F. Dew point will be around 37F with an average humidity of 55%. Winds will be 3 mph from the S.
    Night Details
    Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 39F. Dew point will be around 38F with an average humidity of 70%. Winds will be 3 mph from the S.
  • Forecast day icon
    Monday
    Partly Cloudy
    61°
    Forecast night icon
    Night
    30% Chance of Rain
    40°
    Monday 5/6
    Day
    61°
    Partly Cloudy
    Forecast day icon
    Night
    40°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy. High temperature around 61F. Dew point will be around 39F with an average humidity of 56%. Winds will be 3 mph from the NW.
    Night Details
    Cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 40F. Dew point will be around 38F with an average humidity of 69%. Winds will be 3 mph from the S.
  • Forecast day icon
    Tuesday
    30% Chance of Rain
    64°
    Forecast night icon
    Night
    30% Chance of Rain
    42°
    Tuesday 5/7
    Day
    64°
    30% Chance of Rain
    Forecast day icon
    Night
    42°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 64F. Dew point will be around 38F with an average humidity of 51%. Winds will be 3 mph from the N.
    Night Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 42F. Dew point will be around 40F with an average humidity of 67%. Winds will be 3 mph from the S.