10-Day Weather Forecast - Alton, IL

Sunny. Not as cool with highs in the upper 30s. South winds 10 to 15 mph with gusts up to 30 mph. Wind chill values as low as 3 below this morning.

Clear. Not as cool with lows in the mid 20s. Southwest winds 5 to 10 mph.

Sunny. Not as cool with highs around 50. South winds 10 to 15 mph.

Mostly cloudy. Lows in the lower 30s. Southwest winds 5 to 10 mph.

Sunny. Highs in the lower 50s. Southwest winds around 5 mph becoming southeast in the afternoon.

Mostly cloudy. A chance of rain after midnight. Not as cool with lows in the lower 40s. Temperature rising into the upper 40s after midnight. Chance of rain 40 percent.

Mostly cloudy with rain likely with a slight chance of thunderstorms in the morning then mostly sunny with a slight chance of rain in the afternoon. Highs in the mid 50s. Temperature falling into the lower 40s in the afternoon. Chance of rain 70 percent.

Partly cloudy. Lows around 20. Highs in the upper 30s.

Partly cloudy. Lows around 20. Highs in the upper 30s.

Partly cloudy. Lows in the lower 30s. Highs in the mid 50s.

Partly cloudy. Lows in the lower 30s. Highs in the mid 50s.

Mostly cloudy. A slight chance of rain in the evening. Lows in the mid 30s. Chance of rain 20 percent.

Partly sunny. Highs in the upper 40s.

Partly cloudy. Low temperature around 35F. Dew point will be around 29F with an average humidity of 77%. Winds will be 5 mph from the E.

Partly cloudy. High temperature around 45F. Dew point will be around 35F with an average humidity of 75%. Winds will be 8 mph from the SE.

Cloudy. Low temperature around 44F. Dew point will be around 41F with an average humidity of 87%. Winds will be 6 mph from the S.

Cloudy. High temperature around 51F. Dew point will be around 44F with an average humidity of 83%. Winds will be 2 mph from the S.

Partly cloudy. Low temperature around 42F. Dew point will be around 40F with an average humidity of 83%. Winds will be 2 mph from the NW.