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Alton, IL
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7-Day Forecast
Tonight
Partly Cloudy
Low: 66°
Partly cloudy with a low around 66. East wind around 6 mph becoming calm in the evening.
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Saturday
Partly Sunny then Chance T-storms
High: 85°
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Increasing clouds with a high near 85. Light east wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 30%.
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Saturday Night
Chance T-storms
Low: 71°
A 40% chance of showers and thunderstorms, mainly before 4am. Mostly cloudy with a low around 71. Southeast wind 5 to 7 mph.
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Sunday
Chance T-storms then Showers Likely
High: 88°
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny with a high near 88. South wind 5 to 9 mph. Chance of precipitation is 60%.
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Sunday Night
Slight Chance T-storms
Low: 73°
A 20% chance of showers and thunderstorms before 1am. Partly cloudy with a low around 73. South wind 5 to 8 mph.
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Monday
Chance T-storms
High: 92°
A 30% chance of showers and thunderstorms, mainly after 1pm. Mostly sunny with a high near 92.
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Monday Night
Chance T-storms
Low: 75°
A 30% chance of showers and thunderstorms. Partly cloudy with a low around 75.
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Tuesday
Slight Chance T-storms
High: 95°
A 20% chance of showers and thunderstorms. Sunny with a high near 95.
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Tuesday Night
Slight Chance T-storms
Low: 76°
A 20% chance of showers and thunderstorms. Mostly clear with a low around 76.
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Wednesday
Sunny then Slight Chance T-storms
High: 96°
A 20% chance of showers and thunderstorms after 1pm. Sunny with a high near 96.
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Wednesday Night
Slight Chance T-storms
Low: 75°
A 20% chance of showers and thunderstorms. Mostly clear with a low around 75.
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Thursday
Slight Chance T-storms
High: 95°
A 20% chance of showers and thunderstorms. Sunny with a high near 95.
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Thursday Night
Chance T-storms
Low: 74°
A 30% chance of showers and thunderstorms. Partly cloudy with a low around 74.
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Friday
Sunny then Slight Chance T-storms
High: 91°
A 20% chance of showers and thunderstorms. Sunny with a high near 91.
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Source: National Weather Service
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