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Flood Warning issued May 25 at 9:28PM CDT until further notice by NWS | ...The flood warning continues for the following river in Missouri and Illinois... Mississippi River at Canton Lock and Dam 20 Quincy Quincy Lock and Dam 21 | read more
Weather for Alton, IL
Last Updated on May 26 2017, 7:53 am CDT
Right Now
ovc.png
Overcast
61°
Dew Point: 57°
Humidity: 88%
Pressure: 29.81 in
Visibility: 10.00 miles
Winds: Southeast at 11.5 MPH (10 KT)
By the Hour
Dewpoint: 60°
10:00 AM
http://forecast.weather.gov/images/wtf/tsra40.jpg
71°
Humidity: 68%
Wind: 12 mph
Dewpoint: 63°
1:00 PM
http://forecast.weather.gov/images/wtf/tsra40.jpg
78°
Humidity: 60%
Wind: 13 mph
Dewpoint: 64°
4:00 PM
http://forecast.weather.gov/images/wtf/tsra40.jpg
83°
Humidity: 52%
Wind: 12 mph
Dewpoint: 65°
7:00 PM
http://forecast.weather.gov/images/wtf/tsra40.jpg
78°
Humidity: 64%
Wind: 10 mph
Dewpoint: 65°
10:00 PM
http://forecast.weather.gov/images/wtf/ntsra30.jpg
70°
Humidity: 84%
Wind: 6 mph
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5 Day Forecast
Saturday
High 84°
Low 64°
Sunday
High 78°
Low 57°
Monday
High 79°
Low 57°
Tuesday
High 77°
Low 56°
Wednesday
High 77°
Low 58°
    By the Hour
    Dewpoint: 64°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nbkn.jpg
    66°
    Humidity: 93%
    Wind: 5 mph
    Dewpoint: 63°
    4:00 AM
    http://forecast.weather.gov/images/wtf/nbkn.jpg
    65°
    Humidity: 93%
    Wind: 5 mph
    Dewpoint: 63°
    7:00 AM
    http://forecast.weather.gov/images/wtf/fg.jpg
    64°
    Humidity: 97%
    Wind: 4 mph
    Dewpoint: 65°
    10:00 AM
    http://forecast.weather.gov/images/wtf/bkn.jpg
    76°
    Humidity: 69%
    Wind: 4 mph
    Dewpoint: 67°
    1:00 PM
    http://forecast.weather.gov/images/wtf/tsra50.jpg
    81°
    Humidity: 62%
    Wind: 4 mph
    Dewpoint: 68°
    4:00 PM
    http://forecast.weather.gov/images/wtf/tsra50.jpg
    84°
    Humidity: 59%
    Wind: 5 mph
    Dewpoint: 67°
    7:00 PM
    http://forecast.weather.gov/images/wtf/tsra50.jpg
    81°
    Humidity: 62%
    Wind: 6 mph
    Dewpoint: 66°
    10:00 PM
    http://forecast.weather.gov/images/wtf/ntsra70.jpg
    70°
    Humidity: 87%
    Wind: 6 mph
    By the Hour
    Dewpoint: 65°
    1:00 AM
    http://forecast.weather.gov/images/wtf/ntsra70.jpg
    68°
    Humidity: 91%
    Wind: 4 mph
    Dewpoint: 63°
    4:00 AM
    http://forecast.weather.gov/images/wtf/ntsra70.jpg
    65°
    Humidity: 93%
    Wind: 4 mph
    Dewpoint: 63°
    7:00 AM
    http://forecast.weather.gov/images/wtf/tsra70.jpg
    64°
    Humidity: 97%
    Wind: 6 mph
    Dewpoint: 64°
    10:00 AM
    http://forecast.weather.gov/images/wtf/tsra30.jpg
    70°
    Humidity: 82%
    Wind: 7 mph
    Dewpoint: 63°
    1:00 PM
    http://forecast.weather.gov/images/wtf/tsra30.jpg
    75°
    Humidity: 66%
    Wind: 9 mph
    Dewpoint: 61°
    4:00 PM
    http://forecast.weather.gov/images/wtf/scttsra30.jpg
    78°
    Humidity: 55%
    Wind: 10 mph
    Dewpoint: 59°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    76°
    Humidity: 56%
    Wind: 9 mph
    By the Hour
    Dewpoint: 55°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nfew.jpg
    62°
    Humidity: 78%
    Wind: 5 mph
    Dewpoint: 53°
    7:00 AM
    http://forecast.weather.gov/images/wtf/few.jpg
    58°
    Humidity: 84%
    Wind: 5 mph
    Dewpoint: 53°
    1:00 PM
    http://forecast.weather.gov/images/wtf/few.jpg
    77°
    Humidity: 44%
    Wind: 11 mph
    Dewpoint: 51°
    7:00 PM
    http://forecast.weather.gov/images/wtf/few.jpg
    75°
    Humidity: 43%
    Wind: 10 mph
    By the Hour
    Dewpoint: 52°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nfew.jpg
    62°
    Humidity: 70%
    Wind: 5 mph
    Dewpoint: 52°
    7:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    59°
    Humidity: 78%
    Wind: 6 mph
    Dewpoint: 52°
    1:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    75°
    Humidity: 45%
    Wind: 9 mph
    Dewpoint: 52°
    7:00 PM
    http://forecast.weather.gov/images/wtf/scttsra10.jpg
    74°
    Humidity: 46%
    Wind: 6 mph
    By the Hour
    Dewpoint: 52°
    1:00 AM
    http://forecast.weather.gov/images/wtf/nsct.jpg
    60°
    Humidity: 75%
    Wind: 4 mph
    Dewpoint: 53°
    7:00 AM
    http://forecast.weather.gov/images/wtf/sct.jpg
    57°
    Humidity: 86%
    Wind: 5 mph
    Dewpoint: 54°
    1:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    75°
    Humidity: 48%
    Wind: 6 mph
    Dewpoint: 54°
    7:00 PM
    http://forecast.weather.gov/images/wtf/sct.jpg
    73°
    Humidity: 51%
    Wind: 6 mph
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