O tempo em todas as cidades de Illinóis
C
- Cabrini Addition
- Cadiz
- St. Louis Downtown Airport Cahokia
- Cairo
- California Park
- Calumet City
- Calumet Park
- Camargo
- Canal Trustees
- Carbon
- Carbondale
- Southern Illinois Airport Carbondale
- Carl Sandburg Village
- Carol Stream
- Carpenters Addition
- Carpentersville
- Carrollton
- Carville
- Caspars
- Cedar Lawn
- Central City
- Central Station
- Centralia
- Champaign
- University Of Illinois-Willard Airport Champaign
- Charleston
- Chatham
- Chatham Fields
- Chebanse
- Cheshire Hills
- Chicago
- Chicago Heights
- Chicago Lawn
- Chicago Nexrad
- Chicago Ridge
- Chicago Rockford International Airport
- Dupage County Airport Chicago
- Estación de Guardacostas de Calumet Chicago
- Meigs Chicago
- Midway International Airport Chicago
- O'Hare International Airport Chicago
- Waukegan Regional Airport Chicago
- Chinatown
- Churchville
- Cicero
- Cincinnati
- Cinnamon Creek
- Cityfront Center
- Cityfront Place
- Clarendon Hills
- Clarks Mobile Home Park
- Claus
- Clearing
- Cleone
- Cleveland
- Clifton
- Clintonville
- Cloverdale
- Coffeen
- Coles
- Collinsville
- Como
- Confidence
- Conleys Patch
- Corwith
- Cotswald Subdivision
- Cotton Hill
- Country Club Hills
- Country Oaks
- Country View Estates
- Covington
- Crawford
- Crest Hill
- Crossing
- Cruse
- Crystal Lake
- Cuyler