Alton, Missouri | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
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10 Day Forecast
  • Forecast night icon
    Night
    Partly Cloudy
    66°
    Sunday 5/19
    Forecast night icon
    66°
    Partly Cloudy
    Hourly
    Night Details
    Partly cloudy. Lows in the mid 60s. Southeast winds around 5 mph.
  • Forecast day icon
    Monday
    Partly Cloudy
    85°
    Forecast night icon
    Night
    Mostly Clear
    67°
    Monday 5/20
    Day
    85°
    Partly Cloudy
    Forecast day icon
    Night
    67°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Hot with highs in the mid 80s. South winds 5 to 10 mph.
    Night Details
    Mostly clear. Lows in the mid 60s. South winds 5 to 10 mph.
  • Forecast day icon
    Tuesday
    Mostly Sunny
    87°
    Forecast night icon
    Night
    40% Chance of Storms
    69°
    Tuesday 5/21
    Day
    87°
    Mostly Sunny
    Forecast day icon
    Night
    69°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Sunny hot with highs in the upper 80s. South winds 10 to 15 mph with gusts up to 30 mph.
    Night Details
    Partly cloudy with a slight chance of showers and thunderstorms in the evening then mostly cloudy with a chance of showers and thunderstorms after midnight. Some thunderstorms may be severe in the evening. Humid with lows in the upper 60s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 40 percent.
  • Forecast day icon
    Wednesday
    70% Chance of Storms
    80°
    Forecast night icon
    Night
    70% Chance of Storms
    64°
    Wednesday 5/22
    Day
    80°
    70% Chance of Storms
    Forecast day icon
    Night
    64°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Showers and thunderstorms likely. Highs in the mid 80s. Lows in the lower 60s. Chance of rain 70 percent.
    Night Details
    Showers and thunderstorms likely. Highs in the mid 80s. Lows in the lower 60s. Chance of rain 70 percent.
  • Forecast day icon
    Thursday
    70% Chance of Storms
    78°
    Forecast night icon
    Night
    50% Chance of Storms
    65°
    Thursday 5/23
    Day
    78°
    70% Chance of Storms
    Forecast day icon
    Night
    65°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of thunderstorms. Showers likely mainly in the morning. Highs around 80. Chance of rain 70 percent.
    Night Details
    Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the mid 80s. Chance of rain 50 percent.
  • Forecast day icon
    Friday
    50% Chance of Storms
    80°
    Forecast night icon
    Night
    50% Chance of Storms
    67°
    Friday 5/24
    Day
    80°
    50% Chance of Storms
    Forecast day icon
    Night
    67°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy. A chance of showers and thunderstorms. Lows in the lower 60s. Highs in the mid 80s. Chance of rain 50 percent.
    Night Details
    Partly cloudy with a chance of showers and thunderstorms. Lows in the mid 60s. Chance of rain 50 percent.
  • Forecast day icon
    Saturday
    40% Chance of Storms
    84°
    Forecast night icon
    Night
    40% Chance of Storms
    66°
    Saturday 5/25
    Day
    84°
    40% Chance of Storms
    Forecast day icon
    Night
    66°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly cloudy. A chance of showers and thunderstorms. Hot. Highs in the mid 80s. Lows in the mid 60s. Chance of rain 40 percent.
    Night Details
    Partly cloudy. A chance of showers and thunderstorms. Hot. Highs in the mid 80s. Lows in the mid 60s. Chance of rain 40 percent.
  • Forecast day icon
    Sunday
    40% Chance of Storms
    85°
    Forecast night icon
    Night
    60% Chance of Rain
    69°
    Sunday 5/26
    Day
    85°
    40% Chance of Storms
    Forecast day icon
    Night
    69°
    60% Chance of Rain
    Forecast night icon
    Day Details
    Partly sunny with a chance of showers and thunderstorms. Hot with highs in the mid 80s. Chance of rain 40 percent.
    Night Details
    Mostly clear with a 55% chance for rain and thunderstorms. Low temperature around 69F. Dew point will be around 68F with an average humidity of 82%. Winds will be 4 mph from the S.
  • Forecast day icon
    Monday
    60% Chance of Storms
    82°
    Forecast night icon
    Night
    60% Chance of Storms
    63°
    Monday 5/27
    Day
    82°
    60% Chance of Storms
    Forecast day icon
    Night
    63°
    60% Chance of Storms
    Forecast night icon
    Day Details
    Mostly cloudy with a 75% chance for rain and thunderstorms. High temperature around 82F. Dew point will be around 67F with an average humidity of 74%. Winds will be 5 mph from the S.
    Night Details
    Clear with a 60% chance for rain and thunderstorms. Low temperature around 63F. Dew point will be around 65F with an average humidity of 81%. Winds will be 2 mph from the NW.
  • Forecast day icon
    Tuesday
    40% Chance of Rain
    79°
    Forecast night icon
    Night
    Clear
    61°
    Tuesday 5/28
    Day
    79°
    40% Chance of Rain
    Forecast day icon
    Night
    61°
    Clear
    Forecast night icon
    Day Details
    Sunny with a chance of rain. Chance of precipitation 35%. High temperature around 79F. Dew point will be around 62F with an average humidity of 70%. Winds will be 2 mph from the NW.
    Night Details
    Clear. Low temperature around 61F. Dew point will be around 59F with an average humidity of 76%. Winds will be 4 mph from the N.