10-Day Weather Forecast - Alton, IL

Partly sunny in the morning then becoming mostly cloudy. Not as cool with highs in the mid 50s. South winds 15 to 20 mph with gusts up to 35 mph.

Mostly cloudy. Not as cool with lows in the mid 30s. Southwest winds 5 to 10 mph with gusts up to 25 mph becoming northwest after midnight.

Partly sunny. Highs in the lower 50s. North winds around 5 mph.

Mostly cloudy. A chance of rain in the evening then rain likely after midnight. Lows in the mid 30s. East winds 5 to 10 mph. Chance of rain 60 percent.

Mostly cloudy with a slight chance of rain in the morning then mostly sunny in the afternoon. Highs in the lower 50s. Chance of rain 20 percent.

Mostly clear. Lows in the lower 30s.

Sunny. Not as cool with highs in the mid 60s.

Mostly clear. Lows around 40. Highs in the mid 60s.

Mostly clear. Lows around 40. Highs in the mid 60s.

Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower 30s.

Partly sunny. A slight chance of rain and snow in the morning then a chance of rain and snow in the afternoon. Much cooler with highs in the upper 40s. Chance of precipitation 40 percent.

Mostly cloudy with a 40 percent chance of rain. Lows in the lower 30s.

Mostly cloudy in the morning then becoming partly sunny. A 30 percent chance of rain. Highs in the upper 40s.

Cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 32F. Dew point will be around 32F with an average humidity of 86%. Winds will be 3 mph from the NE.

Cloudy with a slight chance of rain. Chance of precipitation 30%. High temperature around 46F. Dew point will be around 35F with an average humidity of 77%. Winds will be 1 mph from the NE.

Partly cloudy with a chance of rain-snow mix. Chance of precipitation 35%. Low temperature around 32F. Dew point will be around 33F with an average humidity of 80%. Winds will be 2 mph from the N.

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 46F. Dew point will be around 32F with an average humidity of 69%. Winds will be 3 mph from the E.

Partly cloudy. Low temperature around 34F. Dew point will be around 31F with an average humidity of 73%. Winds will be 4 mph from the SE.