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Alton, IL
 84° 
Last Updated on Jul 28 2021, 7:50 pm CDT
Current ConditionsFair
Relative Humidity74%
WindVariable at 3.5 MPH
(3 KT)
Pressure30.00 mb
Dewpoint75.2 F (24.0 C)
Visibility10.00 miles

7-Day Forecast

Tonight
Mostly Clear
Low: 75°
Mostly clear with a low around 75.
Light south wind.


Thursday
Hot
High: 98°
Sunny and hot with a high near 98.
Heat index values as high as 109.
West wind 5 to 14 mph.


Thursday Night
Chance T-storms
Low: 73°
A 40% chance of showers and thunderstorms, mainly
between 8pm and 4am.
Increasing clouds with a low around 73.
Northwest wind 5 to 9 mph becoming
northeast after midnight.


Friday
Slight Chance T-storms
High: 87°
A 20% chance of showers and thunderstorms before 1pm.
Partly sunny with a high near 87.
East wind around 6 mph.


Friday Night
Partly Cloudy then Chance T-storms
Low: 67°
A 40% chance of showers and thunderstorms after 1am.
Mostly cloudy with a low around 67.
East wind around 6 mph becoming calm after midnight.


Saturday
T-storms Likely
High: 80°
Showers and thunderstorms likely, mainly before 1pm.
Mostly cloudy with a high near 80.
Chance of precipitation is 70%.


Saturday Night
Chance T-storms
Low: 67°
A 50% chance of showers and thunderstorms.
Mostly cloudy with a low around 67.


Sunday
Mostly Sunny
High: 84°
Mostly sunny with a high near 84.


Sunday Night
Mostly Clear
Low: 62°
Mostly clear with a low around 62.


Monday
Sunny
High: 81°
Sunny with a high near 81.


Monday Night
Mostly Clear
Low: 61°
Mostly clear with a low around 61.


Tuesday
Sunny
High: 82°
Sunny with a high near 82.


Tuesday Night
Mostly Clear
Low: 62°
Mostly clear with a low around 62.


Wednesday
Sunny
High: 85°
Sunny with a high near 85.


Source: National Weather Service








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