Illinois: Temperature Extremes

MonthMaximum
°F
YearPlaceMinimum
°F
YearPlace
Jan.781986Cahokia–361999Congerville
Feb.832000Kaskaskia River*–351996Elizabeth
March941929Harrisburg–211962Freeport
April991989Kaskaskia–21982Mount Carroll
May1071934Sycamore*211989Elizabeth
June1081954Palestine291972Marengo
July1171954East St. Louis351904Lanark
Aug.1131934La Harpe311915La Grange
Sept.1091925Harrisburg141899Lanarck*
Oct.981953Harrisburg*11925La Harpe
Nov.891987Waterloo–201947Rockford
Dec.791982Cairo–292000Elizabeth*
*Also on earlier dates at the same time or other places.

Idaho: Temperature ExtremesMonthly State Maximum and Minimum Temperature ExtremesIndiana: Temperature Extremes