10-Day Weather Forecast - Alton, IL

A chance of snow in the morning. Mostly cloudy with a slight chance of freezing drizzle. Highs in the mid 30s. North winds 5 to 10 mph. Chance of precipitation 30 percent.

Mostly cloudy. Cooler with lows around 17. North winds around 5 mph.

Mostly sunny. Highs around 30. North winds around 5 mph.

Mostly clear in the evening then becoming partly cloudy. Lows around 15. West winds around 5 mph.

Partly sunny. Not as cool with highs around 40.

Mostly clear. Not as cool with lows in the lower 30s.

Mostly sunny. Highs in the upper 40s.

Mostly clear. Lows in the lower 20s.

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

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

Partly cloudy. Highs in the mid 40s. Lows in the mid 20s.

Partly cloudy. Highs in the mid 40s. Lows in the mid 20s.

Partly cloudy. Highs in the mid 40s. Lows in the mid 20s.

Clear. Low temperature around 31F. Dew point will be around 23F with an average humidity of 65%. Winds will be 6 mph from the SE.

Mostly sunny. High temperature around 43F. Dew point will be around 26F with an average humidity of 58%. Winds will be 8 mph from the SE.

Partly cloudy with a slight chance of rain. Chance of precipitation 30%. Low temperature around 38F. Dew point will be around 31F with an average humidity of 70%. Winds will be 7 mph from the SE.

Cloudy with a chance of rain. Chance of precipitation 35%. High temperature around 48F. Dew point will be around 35F with an average humidity of 70%. Winds will be 10 mph from the SE.

Cloudy with a chance of rain. Chance of precipitation 40%. Low temperature around 44F. Dew point will be around 40F with an average humidity of 79%. Winds will be 7 mph from the SE.