Climate for Illinois
(United States)

Average daytime and nighttime temperatures


All climatic diagrams on this site result from the collected data from 12 measuring stations in Illinois.
All data correspond to the average monthly values of the last 20 years.


Back to overview: United States

The climate widely corresponds to Central European weather conditions. It is cold, wet and a few beautiful summer months are also happening during a year. Due to the warmer temperatures the best time for traveling is from May to September. Nearly unattractive for tourists are the cold months from November to March.

Overview: Climate in the United States
Duration of daylight and sunshine in the United States


hours of sunshine per day
Sunshine hours per day in the United States
rainy days per month
Rainy days per month in the United States
Precipitation in mm/day
Precipitation in the United States
Relative humidity in %
Relative humidity in the United States
Absolute humidity in g/m³ (approx.)
Absolute humidity in the United States

The most important cities in the region of Illinois

Illinois is a part of the United States and has an east-west extension of about 330 km. From north to south it is approximately 600 km. The biggest cities are Chicago and Aurora. The local time is now Sunday, 8:57 am.

CityPopulationGeo-Position 
Chicago2,704,95841°51'0"N87°39'0"W
Aurora197,89941°45'38"N88°19'12"W
Rockford152,87142°16'16"N89°5'38"W
Joliet147,43341°31'31"N88°5'0"W
Naperville141,85341°47'9"N88°8'50"W
Springfield116,25039°48'6"N89°38'37"W
Peoria115,00740°41'37"N89°35'20"W
North Peoria113,00440°43'3"N89°35'3"W
Elgin108,18842°2'14"N88°16'52"W
Waukegan89,07842°21'49"N87°50'41"W
Cicero83,89141°50'44"N87°45'14"W
Champaign81,05540°6'59"N88°14'36"W
Bloomington76,61040°29'3"N88°59'37"W
Decatur76,12239°50'25"N88°57'17"W
Arlington Heights75,10142°5'18"N87°58'50"W
Evanston74,48642°2'28"N87°41'24"W
Schaumburg74,22742°2'0"N88°5'0"W
Bolingbrook73,36641°41'55"N88°4'6"W
Palatine68,55742°6'37"N88°2'3"W
Skokie64,78442°2'0"N87°44'0"W
Des Plaines58,36442°2'0"N87°53'0"W
Orland Park56,76741°37'49"N87°51'14"W
Tinley Park56,70341°34'24"N87°47'4"W
Oak Lawn56,69041°42'39"N87°45'29"W
Berwyn56,65741°51'2"N87°47'37"W
Mount Prospect54,16742°3'59"N87°56'14"W
Wheaton52,89441°51'58"N88°6'25"W
Normal52,49740°30'51"N88°59'26"W
Hoffman Estates51,89542°2'34"N88°4'47"W
Oak Park51,87841°53'6"N87°47'4"W