Weather Forecast for Alton

Alton, IL Weather :: 67F Light Rain

67F Light Rain

Today

A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 78. Southeast wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 50%.

Tonight

Showers and thunderstorms likely before 11pm, then showers likely and possibly a thunderstorm between 11pm and 3am, then a chance of showers and thunderstorms after 3am. Mostly cloudy, with a low around 61. Northwest wind 5 to 7 mph. Chance of precipitation is 70%.

Friday

A 30 percent chance of showers and thunderstorms, mainly before 7am. Sunny, with a high near 76. Northwest wind 8 to 15 mph.

Friday Night

Mostly clear, with a low around 54. Northwest wind 8 to 13 mph becoming light north in the evening.

Saturday

Sunny, with a high near 74. Light north wind.

Saturday Night

Mostly cloudy, with a low around 58.

Sunday

Mostly sunny, with a high near 75.

Sunday Night

Partly cloudy, with a low around 59.

Monday

Partly sunny, with a high near 77.

Monday Night

Partly cloudy, with a low around 63.

Tuesday

Mostly sunny, with a high near 85.

Tuesday Night

Mostly clear, with a low around 68.

Wednesday

Mostly sunny, with a high near 87.