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Alton, IL
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7-Day Forecast
Today
Showers
High: 61°
Showers and possibly a thunderstorm.
High near 61.
North wind around 7 mph.
Chance of precipitation is 80%.
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Tonight
Showers
Low: 54°
Showers with thunderstorms also possible after 4am.
Low around 54.
North wind around 7 mph.
Chance of precipitation is 90%.
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Sunday
Showers
High: 75°
Showers and possibly a thunderstorm, mainly before 1pm,
then a chance of showers and thunderstorms after 1pm.
High near 75.
East wind 9 to 14 mph
with gusts as high as 23 mph.
Chance of precipitation is 80%.
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Sunday Night
Showers
Low: 55°
Showers and possibly a thunderstorm before 4am,
then showers likely.
Low around 55.
Southeast wind around 15 mph becoming
southwest after midnight.
Winds could gust as high as 24 mph.
Chance of precipitation is 90%.
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Monday
Mostly Sunny
High: 69°
Mostly sunny with a high near 69.
West wind 14 to 16 mph
with gusts as high as 25 mph.
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Monday Night
Mostly Clear
Low: 50°
Mostly clear with a low around 50.
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Tuesday
Sunny
High: 79°
Sunny with a high near 79.
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Tuesday Night
Slight Chance T-storms
Low: 56°
A 20% chance of showers and thunderstorms.
Partly cloudy with a low around 56.
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Wednesday
Partly Sunny then Slight Chance T-storms
High: 79°
A 20% chance of showers and thunderstorms after 1pm.
Mostly sunny with a high near 79.
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Wednesday Night
Chance Showers
Low: 58°
A 30% chance of showers.
Mostly cloudy with a low around 58.
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Thursday
Chance Showers
High: 79°
A 50% chance of showers and thunderstorms.
Partly sunny with a high near 79.
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Thursday Night
Showers Likely
Low: 60°
Showers and thunderstorms likely.
Mostly cloudy with a low around 60.
Chance of precipitation is 60%.
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Friday
Showers
High: 74°
Showers and possibly a thunderstorm.
High near 74.
Chance of precipitation is 80%.
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Source: National Weather Service
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