Illinois, United States Climate Records

Warmest September Days

The warmest September days in Illinois are:

Belleville, Illinois1954102.9°F
Belleville, Illinois1971102.4°F
Springfield, Illinois2011102°F
Belleville, Illinois2011100.9°F
Springfield, Illinois1984100.9°F

Coldest September Days

The coldest September days in Illinois were:

Chicago, Illinois198428.9°F
Chicago, Illinois197430°F
Moline, Illinois198430°F
Chicago, Illinois199530°F
Moline, Illinois201230°F

Wettest September Days

The wettest single days in September occurred:

Moline, Illinois20084.6 inches
Springfield, Illinois19864.4 inches
Chicago, Illinois19774.1 inches
Chicago, Illinois20083.9 inches
Peoria, Illinois20083.7 inches