Lewistown, Montana | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast day icon
    Tuesday
    Rain
    42°
    Forecast night icon
    Night
    Frozen Mix
    31°
    Tuesday 5/7
    Day
    42°
    Rain
    Forecast day icon
    Night
    31°
    Frozen Mix
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with likely rain. Chance of precipitation 100%. High temperature around 42F. Dew point will be around 32F with an average humidity of 77%. Winds will be 25 mph from the W.
    Night Details
    Very windy. Colder. Rain and snow in the evening then rain and snow likely after midnight. Areas of blowing snow through the night. Visibility one quarter mile or less at times. Snow accumulation of 2 to 5 inches. Near steady temperature in the mid 30s. Northwest winds 30 to 45 mph decreasing to 20 to 30 mph after midnight. Gusts up to 65 mph. Chance of precipitation near 100 percent.
  • Forecast day icon
    Wednesday
    Rain
    38°
    Forecast night icon
    Night
    Rain
    35°
    Wednesday 5/8
    Day
    38°
    Rain
    Forecast day icon
    Night
    35°
    Rain
    Forecast night icon
    Hourly
    Day Details
    Breezy rain. Highs 45 to 50. Northwest winds 15 to 25 mph. Chance of rain near 100 percent.
    Night Details
    Rain in the evening then chance of rain after midnight. Lows 35 to 45. Northwest winds 5 to 15 mph. Chance of rain near 100 percent.
  • Forecast day icon
    Thursday
    50% Chance of Rain
    51°
    Forecast night icon
    Night
    Mostly Clear
    35°
    Thursday 5/9
    Day
    51°
    50% Chance of Rain
    Forecast day icon
    Night
    35°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Not as cool. Mostly cloudy with a 50 percent chance of rain. Highs 55 to 60. West winds 5 to 15 mph.
    Night Details
    Mostly clear. Lows 35 to 40. West winds 5 to 15 mph.
  • Forecast day icon
    Friday
    Mostly Sunny
    61°
    Forecast night icon
    Night
    Mostly Clear
    42°
    Friday 5/10
    Day
    61°
    Mostly Sunny
    Forecast day icon
    Night
    42°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs 65 to 75. Lows 40 to 50.
    Night Details
    Mostly clear. Highs 65 to 75. Lows 40 to 50.
  • Forecast day icon
    Saturday
    Mostly Sunny
    70°
    Forecast night icon
    Night
    Mostly Clear
    46°
    Saturday 5/11
    Day
    70°
    Mostly Sunny
    Forecast day icon
    Night
    46°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly clear. Highs 65 to 75. Lows 40 to 50.
    Night Details
    Mostly clear. Highs 65 to 75. Lows 40 to 50.
  • Forecast day icon
    Sunday
    Sunny
    71°
    Forecast night icon
    Night
    Mostly Clear
    49°
    Sunday 5/12
    Day
    71°
    Sunny
    Forecast day icon
    Night
    49°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Sunny with a 20 percent chance of thunderstorms. Highs 70 to 75.
    Night Details
    Mostly clear. Lows around 50.
  • Forecast day icon
    Monday
    Sunny
    66°
    Forecast night icon
    Night
    Partly Cloudy
    48°
    Monday 5/13
    Day
    66°
    Sunny
    Forecast day icon
    Night
    48°
    Partly Cloudy
    Forecast night icon
    Day Details
    Sunny with a 20 percent chance of rain. Highs around 75.
    Night Details
    Partly cloudy. Lows 45 to 50.
  • Forecast day icon
    Tuesday
    30% Chance of Rain
    67°
    Forecast night icon
    Night
    30% Chance of Rain
    46°
    Tuesday 5/14
    Day
    67°
    30% Chance of Rain
    Forecast day icon
    Night
    46°
    30% Chance of Rain
    Forecast night icon
    Day Details
    Partly cloudy with a 30 percent chance of rain. Highs 70 to 75.
    Night Details
    Mostly clear with a slight chance of rain. Chance of precipitation 25%. Low temperature around 46F. Dew point will be around 42F with an average humidity of 65%. Winds will be 6 mph from the SW.
  • Forecast day icon
    Wednesday
    Sunny
    65°
    Forecast night icon
    Night
    Clear
    44°
    Wednesday 5/15
    Day
    65°
    Sunny
    Forecast day icon
    Night
    44°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 65F. Dew point will be around 40F with an average humidity of 52%. Winds will be 8 mph from the NW.
    Night Details
    Clear. Low temperature around 44F. Dew point will be around 39F with an average humidity of 65%. Winds will be 5 mph from the S.
  • Forecast day icon
    Thursday
    Mostly Sunny
    67°
    Forecast night icon
    Night
    Partly Cloudy
    45°
    Thursday 5/16
    Day
    67°
    Mostly Sunny
    Forecast day icon
    Night
    45°
    Partly Cloudy
    Forecast night icon
    Day Details
    Mostly sunny. High temperature around 67F. Dew point will be around 39F with an average humidity of 49%. Winds will be 4 mph from the W.
    Night Details
    Partly cloudy. Low temperature around 45F. Dew point will be around 41F with an average humidity of 64%. Winds will be 4 mph from the S.