Alton, Illinois | 10-Day Weather Forecasts & Weekend Weather | WeatherBug
Main Menu
10 Day Forecast
  • Forecast day icon
    Friday
    Sunny
    73°
    Forecast night icon
    Night
    30% Chance of Storms
    61°
    Friday 3/29
    Day
    73°
    Sunny
    Forecast day icon
    Night
    61°
    30% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Sunny. Not as cool with highs in the mid 70s. South winds 5 to 10 mph increasing to 15 to 20 mph this afternoon.
    Night Details
    Mostly cloudy. A chance of showers and thunderstorms after midnight. Not as cool with lows in the mid 50s. South winds 10 to 15 mph with gusts up to 30 mph. Chance of rain 30 percent.
  • Forecast day icon
    Saturday
    Partly Sunny
    75°
    Forecast night icon
    Night
    40% Chance of Storms
    57°
    Saturday 3/30
    Day
    75°
    Partly Sunny
    Forecast day icon
    Night
    57°
    40% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny. Highs in the lower 70s. West winds 10 to 15 mph with gusts up to 25 mph.
    Night Details
    Mostly cloudy. A slight chance of showers in the evening then a chance of showers with a slight chance of thunderstorms after midnight. Lows in the mid 50s. West winds around 5 mph becoming southeast after midnight. Chance of rain 40 percent.
  • Forecast day icon
    Sunday
    50% Chance of Storms
    78°
    Forecast night icon
    Night
    50% Chance of Storms
    65°
    Sunday 3/31
    Day
    78°
    50% Chance of Storms
    Forecast day icon
    Night
    65°
    50% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a chance of showers with a slight chance of thunderstorms. Highs around 80. South winds 10 to 15 mph. Gusts up to 30 mph in the afternoon. Chance of rain 50 percent.
    Night Details
    Mostly cloudy. A slight chance of showers and thunderstorms in the evening then a chance of showers and thunderstorms after midnight. Lows in the lower 60s. Chance of rain 50 percent.
  • Forecast day icon
    Monday
    70% Chance of Storms
    78°
    Forecast night icon
    Night
    70% Chance of Storms
    55°
    Monday 4/1
    Day
    78°
    70% Chance of Storms
    Forecast day icon
    Night
    55°
    70% Chance of Storms
    Forecast night icon
    Hourly
    Day Details
    Mostly cloudy with a chance of thunderstorms. A chance of showers in the morning then showers likely in the afternoon. Highs in the upper 70s. Chance of rain 70 percent.
    Night Details
    Showers and thunderstorms likely mainly in the evening. Cooler with lows in the upper 40s. Chance of rain 70 percent.
  • Forecast day icon
    Tuesday
    Partly Sunny
    56°
    Forecast night icon
    Night
    Partly Cloudy
    41°
    Tuesday 4/2
    Day
    56°
    Partly Sunny
    Forecast day icon
    Night
    41°
    Partly Cloudy
    Forecast night icon
    Hourly
    Day Details
    Partly sunny with a 20 percent chance of showers. Much cooler. Near steady temperature in the lower 50s.
    Night Details
    Mostly cloudy in the evening then becoming partly cloudy. A 20 percent chance of showers. Cooler with lows in the upper 30s.
  • Forecast day icon
    Wednesday
    Mostly Sunny
    53°
    Forecast night icon
    Night
    Mostly Clear
    40°
    Wednesday 4/3
    Day
    53°
    Mostly Sunny
    Forecast day icon
    Night
    40°
    Mostly Clear
    Forecast night icon
    Hourly
    Day Details
    Mostly sunny. Highs in the mid 50s.
    Night Details
    Mostly clear. Lows in the upper 30s. Highs in the mid 60s.
  • Forecast day icon
    Thursday
    Mostly Sunny
    60°
    Forecast night icon
    Night
    Clear
    47°
    Thursday 4/4
    Day
    60°
    Mostly Sunny
    Forecast day icon
    Night
    47°
    Clear
    Forecast night icon
    Day Details
    Mostly clear. Lows in the upper 30s. Highs in the mid 60s.
    Night Details
    Clear. Low temperature around 47F. Dew point will be around 38F with an average humidity of 63%. Winds will be 5 mph from the SE.
  • Forecast day icon
    Friday
    Sunny
    71°
    Forecast night icon
    Night
    Clear
    50°
    Friday 4/5
    Day
    71°
    Sunny
    Forecast day icon
    Night
    50°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 71F. Dew point will be around 45F with an average humidity of 58%. Winds will be 6 mph from the SE.
    Night Details
    Clear. Low temperature around 50F. Dew point will be around 46F with an average humidity of 71%. Winds will be 5 mph from the SE.
  • Forecast day icon
    Saturday
    Sunny
    70°
    Forecast night icon
    Night
    Clear
    53°
    Saturday 4/6
    Day
    70°
    Sunny
    Forecast day icon
    Night
    53°
    Clear
    Forecast night icon
    Day Details
    Sunny. High temperature around 70F. Dew point will be around 50F with an average humidity of 66%. Winds will be 8 mph from the SE.
    Night Details
    Clear. Low temperature around 53F. Dew point will be around 49F with an average humidity of 74%. Winds will be 6 mph from the SE.
  • Forecast day icon
    Sunday
    30% Chance of Rain
    70°
    Forecast night icon
    Night
    40% Chance of Rain
    54°
    Sunday 4/7
    Day
    70°
    30% Chance of Rain
    Forecast day icon
    Night
    54°
    40% Chance of Rain
    Forecast night icon
    Day Details
    Sunny with a slight chance of rain. Chance of precipitation 25%. High temperature around 70F. Dew point will be around 52F with an average humidity of 68%. Winds will be 5 mph from the S.
    Night Details
    Clear with a chance of rain. Chance of precipitation 35%. Low temperature around 54F. Dew point will be around 51F with an average humidity of 75%. Winds will be 4 mph from the S.