Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Tuesday
    Rain
    57°
    Forecast night icon
    Night
    Partly Cloudy
    44°
    Tuesday 5/14
    Day
    57°
    Rain
    Forecast day icon
    Night
    44°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with likely rain. Chance of precipitation 85%. High temperature around 57F. Dew point will be around 44F with an average humidity of 75%. Winds will be 9 mph from the NW.
    Night Details
    Colder. Mostly cloudy with a 20 percent chance of thunderstorms in the evening then partly cloudy after midnight. Lows 40 to 45. West winds 5 to 15 mph.
  • Forecast day icon
    Wednesday
    Partly Cloudy
    69°
    Forecast night icon
    Night
    40% Chance of Storms
    50°
    Wednesday 5/15
    Day
    69°
    Partly Cloudy
    Forecast day icon
    Night
    50°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Sunny in the morning then partly cloudy with a 20 percent chance of thunderstorms in the afternoon. Highs 65 to 70. West winds 5 to 15 mph.
    Night Details
    Mostly cloudy. Chance of rain showers and slight chance of thunderstorms in the evening then slight chance of rain showers after midnight. Lows 45 to 50. West winds 5 to 15 mph. Chance of precipitation 40 percent.
  • Forecast day icon
    Thursday
    50% Chance of Storms
    75°
    Forecast night icon
    Night
    40% Chance of Storms
    49°
    Thursday 5/16
    Day
    75°
    50% Chance of Storms
    Forecast day icon
    Night
    49°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. Slight chance of rain showers in the morning then chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 70 to 75. West winds 5 to 15 mph. Chance of precipitation 50 percent.
    Night Details
    Mostly cloudy with chance of rain showers and slight chance of thunderstorms in the evening then mostly clear with slight chance of rain showers after midnight. Lows 45 to 50. West winds 10 to 15 mph. Chance of precipitation 40 percent.
  • Forecast day icon
    Friday
    50% Chance Rain Showers
    69°
    Forecast night icon
    Night
    50% Chance Rain Showers
    40°
    Friday 5/17
    Day
    69°
    50% Chance Rain Showers
    Forecast day icon
    Night
    40°
    50% Chance Rain Showers
    Forecast night icon
    Hourly
    Day Details
    Windy. Partly cloudy with a 50 percent chance of rain showers. Highs 65 to 70.
    Night Details
    Breezy cooler. Mostly cloudy with a 50 percent chance of rain showers. Lows 40 to 45. Highs around 60.
  • Forecast day icon
    Saturday
    50% Chance Rain Showers
    57°
    Forecast night icon
    Night
    Partly Cloudy
    37°
    Saturday 5/18
    Day
    57°
    50% Chance Rain Showers
    Forecast day icon
    Night
    37°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Breezy cooler. Mostly cloudy with a 50 percent chance of rain showers. Lows 40 to 45. Highs around 60.
    Night Details
    Partly cloudy with a 20 percent chance of rain showers. Lows around 40.
  • Forecast day icon
    Sunday
    50% Chance of Storms
    63°
    Forecast night icon
    Night
    Partly Cloudy
    40°
    Sunday 5/19
    Day
    63°
    50% Chance of Storms
    Forecast day icon
    Night
    40°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent.
    Night Details
    Partly cloudy with a 20 percent chance of rain showers. Lows 40 to 45.
  • Forecast day icon
    Monday
    50% Chance of Storms
    62°
    Forecast night icon
    Night
    40% Chance Rain Showers
    41°
    Monday 5/20
    Day
    62°
    50% Chance of Storms
    Forecast day icon
    Night
    41°
    40% Chance Rain Showers
    Forecast night icon
    Day Details
    Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 65. Chance of precipitation 50 percent.
    Night Details
    Mostly cloudy with a 40 percent chance of rain showers. Lows 40 to 45.
  • Forecast day icon
    Tuesday
    50% Chance of Storms
    64°
    Forecast night icon
    Night
    40% Chance of Rain
    42°
    Tuesday 5/21
    Day
    64°
    50% Chance of Storms
    Forecast day icon
    Night
    42°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 60. Chance of precipitation 50 percent.
    Night Details
    Mostly cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 42F. Dew point will be around 36F with an average humidity of 61%. Winds will be 5 mph from the S.
  • Forecast day icon
    Wednesday
    50% Chance of Rain
    63°
    Forecast night icon
    Night
    70% Chance of Rain
    42°
    Wednesday 5/22
    Day
    63°
    50% Chance of Rain
    Forecast day icon
    Night
    42°
    70% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a chance of rain. Chance of precipitation 45%. High temperature around 63F. Dew point will be around 40F with an average humidity of 54%. Winds will be 5 mph from the NW.
    Night Details
    Cloudy with probable rain. Chance of precipitation 65%. Low temperature around 42F. Dew point will be around 39F with an average humidity of 67%. Winds will be 4 mph from the SW.
  • Forecast day icon
    Thursday
    70% Chance of Rain
    57°
    Forecast night icon
    Night
    50% Chance of Rain
    40°
    Thursday 5/23
    Day
    57°
    70% Chance of Rain
    Forecast day icon
    Night
    40°
    50% Chance of Rain
    Forecast night icon
    Day Details
    Cloudy with probable rain. Chance of precipitation 65%. High temperature around 57F. Dew point will be around 42F with an average humidity of 66%. Winds will be 7 mph from the NW.
    Night Details
    Cloudy with a chance of rain. Chance of precipitation 50%. Low temperature around 40F. Dew point will be around 38F with an average humidity of 72%. Winds will be 4 mph from the NW.