Weather Forecast for
Zip Code 62002 Alton, IL

Tonight: Scattered showers and thunderstorms, mainly after midnight. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 64. South wind 5 to 8 mph becoming west after midnight. Chance of precipitation is 50%.

Sunday: Isolated showers and thunderstorms before 7am, then isolated showers between 7am and 10am. Mostly cloudy, then gradually becoming sunny, with a high near 75. Northwest wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

Sunday Night: Partly cloudy, with a low around 55. Northwest wind 5 to 9 mph becoming calm in the evening.

Monday: Sunny, with a high near 77. Calm wind becoming west 5 to 7 mph in the afternoon.

Monday Night: Mostly clear, with a low around 58. Southwest wind 3 to 5 mph.

Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 80.

Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60. Chance of precipitation is 20%.

Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86. Breezy.

Wednesday Night: Showers and possibly a thunderstorm. Low around 68. Breezy. Chance of precipitation is 90%.

Thursday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.

Thursday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 60.

Juneteenth: Mostly sunny, with a high near 82.

Friday Night: Partly cloudy, with a low around 62.

Saturday: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.

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