Weather Forecast for Alton

Alton, IL Weather :: 69F Fog/Mist

69F Fog/Mist

Tonight

Isolated showers and thunderstorms before 2am. Mostly cloudy, with a low around 65. Northeast wind 3 to 5 mph. Chance of precipitation is 20%.

Tuesday

Isolated showers and thunderstorms before 4pm. Partly sunny, with a high near 83. Northeast wind 3 to 7 mph. Chance of precipitation is 20%.

Tuesday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. Northeast wind 3 to 6 mph.

Wednesday

Showers and thunderstorms. High near 81. Light south wind. Chance of precipitation is 80%.

Wednesday Night

A 50 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 64. South wind around 5 mph becoming west after midnight.

Thursday

Mostly sunny, with a high near 80.

Thursday Night

Mostly clear, with a low around 66.

Friday

A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87.

Friday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 73.

Saturday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

Saturday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

Sunday

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 85.

Sunday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.

Monday

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 84.