Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Cloudy
    42°
    Sunday 5/5
    Forecast night icon
    42°
    Cloudy
    Hourly
    Night Details
    Cloudy with a 20 percent chance of rain. Lows 45 to 50. West winds 5 to 15 mph. Gusts up to 35 mph after midnight.
  • Forecast day icon
    Monday
    70% Chance of Rain
    44°
    Forecast night icon
    Night
    50% Chance Frozen Mix
    38°
    Monday 5/6
    Day
    44°
    70% Chance of Rain
    Forecast day icon
    Night
    38°
    50% Chance Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Windy cooler cloudy. Rain likely in the morning then chance of rain in the afternoon. Highs 50 to 55. West winds 25 to 35 mph with gusts to around 50 mph. Chance of rain 70 percent.
    Night Details
    Very windy. Colder cloudy. Chance of rain in the evening then chance of rain and snow after midnight. Lows around 40. West winds 25 to 40 mph with gusts to around 55 mph. Chance of precipitation 50 percent.
  • Forecast day icon
    Tuesday
    Frozen Mix
    41°
    Forecast night icon
    Night
    Frozen Mix
    32°
    Tuesday 5/7
    Day
    41°
    Frozen Mix
    Forecast day icon
    Night
    32°
    Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Very windy. Cloudy. Chance of rain and snow in the morning then rain and snow in the afternoon. Light snow accumulations. Highs 40 to 45. West winds 30 to 45 mph with gusts to around 60 mph. Chance of precipitation 90 percent.
    Night Details
    Very windy. Rain and snow. Moderate snow accumulations. Lows 35 to 40. West winds 30 to 45 mph with gusts to around 60 mph. Chance of precipitation near 100 percent.
  • Forecast day icon
    Wednesday
    Frozen Mix
    39°
    Forecast night icon
    Night
    Rain
    34°
    Wednesday 5/8
    Day
    39°
    Frozen Mix
    Forecast day icon
    Night
    34°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Windy. Rain and snow. Moderate snow accumulations. Highs 40 to 45. Chance of precipitation near 100 percent.
    Night Details
    Rain. Lows 35 to 45. Chance of rain 90 percent.
  • Forecast day icon
    Thursday
    50% Chance of Rain
    48°
    Forecast night icon
    Night
    Partly Cloudy
    33°
    Thursday 5/9
    Day
    48°
    50% Chance of Rain
    Forecast day icon
    Night
    33°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Not as cool. Mostly cloudy with a 50 percent chance of rain. Highs 55 to 60.
    Night Details
    Partly cloudy with a 20 percent chance of rain. Lows 35 to 40.
  • Forecast day icon
    Friday
    Partly Cloudy
    62°
    Forecast night icon
    Night
    Mostly Clear
    37°
    Friday 5/10
    Day
    62°
    Partly Cloudy
    Forecast day icon
    Night
    37°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. Highs 60 to 65.
    Night Details
    Mostly clear. Lows 40 to 50. Highs 70 to 75.
  • Forecast day icon
    Saturday
    Mostly Sunny
    70°
    Forecast night icon
    Night
    Mostly Clear
    45°
    Saturday 5/11
    Day
    70°
    Mostly Sunny
    Forecast day icon
    Night
    45°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Lows 40 to 50. Highs 70 to 75.
    Night Details
    Mostly clear. Lows 40 to 50. Highs 70 to 75.
  • Forecast day icon
    Sunday
    Sunny
    68°
    Forecast night icon
    Night
    Clear
    47°
    Sunday 5/12
    Day
    68°
    Sunny
    Forecast day icon
    Night
    47°
    Clear
    Forecast night icon
    Day Details
    Sunny with a 20 percent chance of thunderstorms. Highs 70 to 75.
    Night Details
    Clear. Low temperature around 47F. Dew point will be around 43F with an average humidity of 68%. Winds will be 6 mph from the S.
  • Forecast day icon
    Monday
    30% Chance of Rain
    69°
    Forecast night icon
    Night
    30% Chance of Rain
    46°
    Monday 5/13
    Day
    69°
    30% Chance of Rain
    Forecast day icon
    Night
    46°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 30%. High temperature around 69F. Dew point will be around 41F with an average humidity of 47%. Winds will be 6 mph from the NW.
    Night Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 46F. Dew point will be around 44F with an average humidity of 71%. Winds will be 6 mph from the S.
  • Forecast day icon
    Tuesday
    30% Chance of Rain
    64°
    Forecast night icon
    Night
    30% Chance of Rain
    43°
    Tuesday 5/14
    Day
    64°
    30% Chance of Rain
    Forecast day icon
    Night
    43°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 64F. Dew point will be around 42F with an average humidity of 56%. Winds will be 6 mph from the NW.
    Night Details
    Mostly cloudy with a slight chance of rain. Chance of precipitation 25%. Low temperature around 43F. Dew point will be around 43F with an average humidity of 78%. Winds will be 4 mph from the SW.