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Flash Flood Watch issued May 29 at 8:55PM CDT until May 30 at 12:00PM CDT by NWS | ...FLASH FLOOD WATCH IN EFFECT THROUGH SATURDAY MORNING... THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * FLASH FLOOD WATCH FOR PORTIONS OF SOUTHWEST ILLINOIS AND MISSOURI...INCLUDING THE FOLLOWING COUNTIES...IN SOUTHWEST ILLINOIS...CALHOUN IL...JERSEY IL...MADISON IL...MONROE IL AND ST. CLAIR IL. IN MISSOURI...AUDRAIN MO...BOONE MO... | read more
Weather for Alton, IL
Last Updated on May 29 2015, 3:55 pm CDT
Right Now
hi_tsra.png
Thunderstorm in Vicinity
77°
Dew Point: 77°
Humidity: 100%
Pressure: 29.98 in
Visibility: 10.00 miles
Winds: Southeast at 9.2 MPH (8 KT)
By the Hour
Dewpoint: 68°
10:00 PM
http://forecast.weather.gov/images/wtf/ntsra80.jpg
72°
Humidity: 87%
Wind: 6 mph
Find Weather

6 Day Forecast
Saturday
High 66°
Low 51°
http://forecast.weather.gov/images/wtf/tsra80.jpg
Sunday
High 73°
Low 52°
http://forecast.weather.gov/images/wtf/bkn.jpg
Monday
High 77°
Low 56°
http://forecast.weather.gov/images/wtf/sct.jpg
Tuesday
High 82°
Low 61°
http://forecast.weather.gov/images/wtf/sct.jpg
Wednesday
High 85°
Low 65°
http://forecast.weather.gov/images/wtf/sct.jpg
Thursday
High 85°
Low 67°
http://forecast.weather.gov/images/wtf/scttsra20.jpg
    By the Hour
    Dewpoint: 66°
    1:00 AM
    http://forecast.weather.gov/images/wtf/ntsra80.jpg
    71°
    Humidity: 84%
    Wind: 6 mph
    Dewpoint: 65°
    4:00 AM
    http://forecast.weather.gov/images/wtf/ntsra80.jpg
    70°
    Humidity: 84%
    Wind: 5 mph
    Dewpoint: 66°
    7:00 AM
    http://forecast.weather.gov/images/wtf/tsra80.jpg
    70°
    Humidity: 87%
    Wind: 5 mph
    Dewpoint: 66°
    10:00 AM
    http://forecast.weather.gov/images/wtf/tsra80.jpg
    73°
    Humidity: 78%
    Wind: 6 mph
    Dewpoint: 66°
    1:00 PM
    http://forecast.weather.gov/images/wtf/tsra80.jpg
    74°
    Humidity: 76%
    Wind: 7 mph
    Dewpoint: 65°
    4:00 PM
    http://forecast.weather.gov/images/wtf/tsra80.jpg
    72°
    Humidity: 79%
    Wind: 17 mph
    Dewpoint: 62°
    7:00 PM
    http://forecast.weather.gov/images/wtf/tsra80.jpg
    68°
    Humidity: 81%
    Wind: 12 mph
    Dewpoint: 57°
    10:00 PM
    http://forecast.weather.gov/images/wtf/nra30.jpg
    63°
    Humidity: 81%
    Wind: 12 mph
    By the Hour
    Dewpoint: 51°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nra30.jpg
    59°
    Humidity: 74%
    Wind: 12 mph
    Dewpoint: 48°
    4:00 AM
    http://forecast.weather.gov/images/wtf/nra30.jpg
    55°
    Humidity: 77%
    Wind: 11 mph
    Dewpoint: 45°
    7:00 AM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    53°
    Humidity: 75%
    Wind: 10 mph
    Dewpoint: 48°
    10:00 AM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    59°
    Humidity: 67%
    Wind: 10 mph
    Dewpoint: 50°
    1:00 PM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    64°
    Humidity: 60%
    Wind: 10 mph
    Dewpoint: 51°
    4:00 PM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    65°
    Humidity: 60%
    Wind: 10 mph
    Dewpoint: 52°
    7:00 PM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    64°
    Humidity: 65%
    Wind: 9 mph
    Dewpoint: 51°
    10:00 PM
    http://forecast.weather.gov/images/wtf/nbkn.jpg
    58°
    Humidity: 77%
    Wind: 7 mph
    By the Hour
    Dewpoint: 51°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    56°
    Humidity: 83%
    Wind: 6 mph
    Dewpoint: 50°
    4:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    54°
    Humidity: 86%
    Wind: 6 mph
    Dewpoint: 50°
    7:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    55°
    Humidity: 83%
    Wind: 7 mph
    Dewpoint: 52°
    10:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    64°
    Humidity: 65%
    Wind: 7 mph
    Dewpoint: 54°
    1:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    70°
    Humidity: 57%
    Wind: 7 mph
    Dewpoint: 55°
    4:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    72°
    Humidity: 55%
    Wind: 6 mph
    Dewpoint: 55°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    70°
    Humidity: 59%
    Wind: 6 mph
    By the Hour
    Dewpoint: 54°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    61°
    Humidity: 78%
    Wind: 5 mph
    Dewpoint: 54°
    7:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    59°
    Humidity: 84%
    Wind: 5 mph
    Dewpoint: 58°
    1:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    74°
    Humidity: 57%
    Wind: 6 mph
    Dewpoint: 59°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    75°
    Humidity: 58%
    Wind: 6 mph
    By the Hour
    Dewpoint: 57°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    65°
    Humidity: 76%
    Wind: 5 mph
    Dewpoint: 58°
    7:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    64°
    Humidity: 81%
    Wind: 4 mph
    Dewpoint: 61°
    1:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    79°
    Humidity: 54%
    Wind: 7 mph
    Dewpoint: 62°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    79°
    Humidity: 56%
    Wind: 6 mph
    By the Hour
    Dewpoint: 61°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    70°
    Humidity: 74%
    Wind: 6 mph
    Dewpoint: 62°
    7:00 AM
    http://forecast.weather.gov/images/wtf/scttsra10.jpg
    68°
    Humidity: 81%
    Wind: 5 mph
    Dewpoint: 64°
    1:00 PM
    http://forecast.weather.gov/images/wtf/scttsra20.jpg
    82°
    Humidity: 55%
    Wind: 7 mph
    Dewpoint: 65°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    82°
    Humidity: 56%
    Wind: 7 mph
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Colored Legend for rainfall intensity    Colored Legend for mixed precipitation intensity    Colored Legend for snowfall intensity
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National Forecast

200 W. Third Street | Alton, IL 62002
Suite 200
618.465.9850
    
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