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Alton, IL
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7-Day Forecast
Today
Gradual Clearing and Breezy
High: 44°
Cloudy through mid morning, then gradual clearing with a high near 44. Breezy with a northwest wind 21 to 23 mph with gusts as high as 36 mph.
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Tonight
Mostly Cloudy and Breezy then Mostly Cloudy
Low: 35°
Mostly cloudy with a low around 35. Breezy with a northwest wind 13 to 21 mph with gusts as high as 32 mph.
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Friday
Partly Sunny
High: 47°
Partly sunny with a high near 47. Northwest wind 9 to 14 mph with gusts as high as 21 mph.
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Friday Night
Partly Cloudy
Low: 31°
Partly cloudy with a low around 31. Northwest wind 5 to 8 mph becoming calm in the evening.
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Saturday
Sunny
High: 53°
Sunny with a high near 53. Calm wind becoming southwest around 5 mph.
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Saturday Night
Partly Cloudy
Low: 39°
Partly cloudy with a low around 39.
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Sunday
Mostly Sunny
High: 63°
Mostly sunny with a high near 63.
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Sunday Night
Chance Rain
Low: 48°
A 40% chance of rain. Mostly cloudy with a low around 48.
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Monday
Chance Rain
High: 57°
A 30% chance of rain, mainly before noon. Partly sunny with a high near 57.
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Monday Night
Mostly Clear
Low: 29°
Mostly clear with a low around 29.
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Tuesday
Mostly Sunny
High: 44°
Mostly sunny with a high near 44.
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Tuesday Night
Mostly Cloudy then Slight Chance Rain
Low: 29°
A 20% chance of rain. Mostly cloudy with a low around 29.
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Wednesday
Chance Rain
High: 44°
A 30% chance of rain. Partly sunny with a high near 44.
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Source: National Weather Service
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