Weather for all the cities of Illinois
C
- St. Louis Downtown Airport Cahokia
- Cairo
- California Park
- Canal Trustees
- Carbondale
- Carlsburg
- Carol Stream
- Carpenters Addition
- Cartter
- Casey
- Cayuga
- Cedar Park
- Center Hill
- Central
- Central Station
- Centralia
- Champaign
- University Of Illinois-Willard Airport Champaign
- Channahon
- Channel Lake
- Chatham
- Chatsworth
- Chebanse
- Chenoa
- Cherry Hill
- Cherry Valley
- Chestnut Mountain Resort
- Chicago
- Chicago Ridge
- Dupage County Airport Chicago
- Estación de Guardacostas de Calumet Chicago
- Executive Airport Pal-Waukee Chicago
- Meigs Chicago
- Midway International Airport Chicago
- O'Hare International Airport Chicago
- Churchville
- Cicero
- Cincinnati
- Cityfront Center
- Cityfront Place
- Claremont Cottages
- Clark Center
- Clarkdale
- Cloverdale
- Conleys Patch
- Coral
- Cortland
- Country Club Hills
- Country Oaks
- Countryside
- Covington
- Crainville
- Crawford
- Creamery Corners
- Creekside
- Crest Hill
- Crestwood
- Crossville
- Crystal Lake
- Crystal Vista
- Cuba
- Cumberland
- Curran