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Alton, IL
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7-Day Forecast
Overnight
Mostly Cloudy
Low: 55°
Mostly cloudy with a low around 55.
Light northeast wind.
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Wednesday
Showers and Patchy Fog
High: 72°
Showers and thunderstorms before noon,
then showers likely and possibly a thunderstorm
between noon and 1pm,
then scattered showers and thunderstorms after 1pm.
Patchy fog
between 9am and noon.
High near 72.
East wind 7 to 10 mph.
Chance of precipitation is 80%.
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Wednesday Night
Showers
Low: 63°
Showers and possibly a thunderstorm.
Low around 63.
Southeast wind around 8 mph.
Chance of precipitation is 80%.
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Thursday
Showers
High: 74°
Showers and possibly a thunderstorm.
High near 74.
Southwest wind 9 to 14 mph
with gusts as high as 22 mph.
Chance of precipitation is 100%.
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Thursday Night
Chance Showers
Low: 55°
A chance of showers and thunderstorms before 10pm,
then a chance of showers
between 10pm and 1am.
Mostly cloudy with a low around 55.
West wind 7 to 10 mph.
Chance of precipitation is 30%.
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Friday
Mostly Sunny then Chance Showers
High: 72°
A 30% chance of showers after 1pm.
Mostly sunny with a high near 72.
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Friday Night
Partly Cloudy
Low: 47°
Partly cloudy with a low around 47.
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Saturday
Sunny
High: 68°
Sunny with a high near 68.
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Saturday Night
Mostly Clear
Low: 47°
Mostly clear with a low around 47.
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Sunday
Sunny
High: 73°
Sunny with a high near 73.
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Sunday Night
Mostly Clear
Low: 50°
Mostly clear with a low around 50.
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Monday
Sunny
High: 77°
Sunny with a high near 77.
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Monday Night
Mostly Clear
Low: 55°
Mostly clear with a low around 55.
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Tuesday
Sunny
High: 81°
Sunny with a high near 81.
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Source: National Weather Service
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