UV Index Today in Cook County, Illinois (IL) Wednesday, July 15, 2026 -12:00 PM CDT (GMT-5) The average maximum UV Index today across 177 locations in Cook County, Illinois (IL) , is 9.5. The highest projected maximum is 9.8 in Lockport at 1:00 PM CDT, while the lowest projected maximum is 9.3 in Wheeling at 1:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 8.7. The highest projected maximum is 9.2 in Lockport at 1:00 PM CDT, and the lowest projected maximum is 8.5 in Maine at 1:00 PM CDT.
29 County Subdivisions in Cook County, Illinois (IL) Maximum UV Index Today
Barrington - 9.3
Berwyn - 9.4
Bloom - 9.6
Bremen - 9.7
Calumet - 9.4
Cicero - 9.4
Elk Grove - 9.3
Hanover - 9.3
Lemont - 9.4
Leyden - 9.7
Lyons - 9.4
Maine - 9.7
New Trier - 9.7
Niles - 9.7
Northfield - 9.7
Norwood Park - 9.7
Oak Park - 9.7
Orland - 9.7
Palatine - 9.3
Palos - 9.4
Proviso - 9.4
Rich - 9.7
River Forest - 9.7
Riverside - 9.4
Schaumburg - 9.3
Stickney - 9.4
Thornton - 9.6
Wheeling - 9.3
Worth - 9.4148 Places in Cook County, Illinois (IL) Maximum UV Index Today
Alsip - 9.4
Arlington Heights - 9.3
Barrington - 9.6
Barrington Hills - 9.6
Bartlett - 9.3
Bedford Park - 9.4
Bellwood - 9.3
Bensenville - 9.3
Berkeley - 9.3
Berwyn - 9.4
Blue Island - 9.4
Bridgeview - 9.4
Broadview - 9.4
Brookfield - 9.4
Buffalo Grove - 9.7
Burbank - 9.4
Burnham - 9.6
Burr Ridge - 9.4
Calumet City - 9.6
Calumet Park - 9.4
Chicago - 9.4
Chicago Heights - 9.7
Chicago Ridge - 9.4
Cicero - 9.4
Country Club Hills - 9.7
Countryside - 9.4
Crestwood - 9.4
Crete - 9.6
Deerfield - 9.7
Deer Park - 9.7
Des Plaines - 9.3
Dixmoor - 9.4
Dolton - 9.6
East Dundee - 9.3
East Hazel Crest - 9.7
Elgin - 9.3
Elk Grove Village - 9.3
Elmhurst - 9.3
Elmwood Park - 9.7
Evanston - 9.7
Evergreen Park - 9.4
Flossmoor - 9.7
Ford Heights - 9.6
Forest Park - 9.4
Forest View - 9.4
Frankfort - 9.7
Frankfort Square - 9.7
Franklin Park - 9.3
Glencoe - 9.7
Glenview - 9.7
Glenwood - 9.6
Golf - 9.7
Hanover Park - 9.3
Harvey - 9.7
Harwood Heights - 9.7
Hazel Crest - 9.7
Hickory Hills - 9.4
Highland Park - 9.7
Hillside - 9.4
Hinsdale - 9.4
Hodgkins - 9.4
Hoffman Estates - 9.3
Homer Glen - 9.8
Hometown - 9.4
Homewood - 9.7
Indian Head Park - 9.4
Inverness - 9.3
Itasca - 9.3
Justice - 9.4
Kenilworth - 9.7
La Grange - 9.4
La Grange Park - 9.4
Lansing - 9.6
Lemont - 9.4
Lincolnwood - 9.7
Lockport - 9.8
Long Grove - 9.7
Lynwood - 9.6
Lyons - 9.4
Markham - 9.7
Matteson - 9.7
Maywood - 9.7
Melrose Park - 9.7
Merrionette Park - 9.4
Midlothian - 9.4
Morton Grove - 9.7
Mount Prospect - 9.3
Niles - 9.7
Norridge - 9.7
Northbrook - 9.7
Northfield - 9.7
Northlake - 9.3
North Riverside - 9.4
Oak Brook - 9.4
Oak Forest - 9.7
Oak Lawn - 9.4
Oak Park - 9.7
Olympia Fields - 9.7
Orland Hills - 9.7
Orland Park - 9.7
Palatine - 9.3
Palos Heights - 9.4
Palos Hills - 9.4
Palos Park - 9.4
Park Forest - 9.7
Park Ridge - 9.7
Phoenix - 9.7
Plum Valley - 9.6
Posen - 9.4
Prospect Heights - 9.3
Richton Park - 9.7
Riverdale - 9.4
River Forest - 9.7
River Grove - 9.7
Riverside - 9.4
Riverwoods - 9.7
Robbins - 9.4
Rolling Meadows - 9.3
Romeoville - 9.4
Roselle - 9.3
Rosemont - 9.7
Sauk Village - 9.6
Schaumburg - 9.3
Schiller Park - 9.7
Skokie - 9.7
South Barrington - 9.3
South Chicago Heights - 9.7
South Holland - 9.6
Steger - 9.6
Stickney - 9.4
Stone Park - 9.3
Streamwood - 9.3
Summit - 9.4
Thornton - 9.6
Tinley Park - 9.7
University Park - 9.7
Westchester - 9.4
Western Springs - 9.4
Wheeling - 9.7
Willow Springs - 9.4
Wilmette - 9.7
Winnetka - 9.7
Wood Dale - 9.3
Woodridge - 9.4
Worth - 9.4
Dyer - 9.6
Hammond - 9.6
Munster - 9.6