UV Index Today in Cook County, Illinois (IL) Saturday, August 8, 2026 -11:15 AM CDT (GMT-5) The average maximum UV Index today across 177 locations in Cook County, Illinois (IL) , is 8.4. The highest projected maximum is 8.5 in Wheeling at 1:00 PM CDT, while the lowest projected maximum is 8.4 in Chicago at 1:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 5.6. The highest projected maximum is 6.1 in Thornton at 12:00 PM CDT, and the lowest projected maximum is 5 in Northbrook at 1:00 PM CDT.
29 County Subdivisions in Cook County, Illinois (IL) Maximum UV Index Today
Barrington - 8.5
Berwyn - 8.4
Bloom - 8.4
Bremen - 8.4
Calumet - 8.4
Cicero - 8.4
Elk Grove - 8.5
Hanover - 8.5
Lemont - 8.5
Leyden - 8.5
Lyons - 8.4
Maine - 8.5
New Trier - 8.5
Niles - 8.5
Northfield - 8.5
Norwood Park - 8.5
Oak Park - 8.5
Orland - 8.4
Palatine - 8.5
Palos - 8.4
Proviso - 8.4
Rich - 8.4
River Forest - 8.5
Riverside - 8.4
Schaumburg - 8.5
Stickney - 8.4
Thornton - 8.4
Wheeling - 8.5
Worth - 8.4148 Places in Cook County, Illinois (IL) Maximum UV Index Today
Alsip - 8.4
Arlington Heights - 8.5
Barrington - 8.5
Barrington Hills - 8.5
Bartlett - 8.5
Bedford Park - 8.4
Bellwood - 8.5
Bensenville - 8.5
Berkeley - 8.5
Berwyn - 8.4
Blue Island - 8.4
Bridgeview - 8.4
Broadview - 8.4
Brookfield - 8.4
Buffalo Grove - 8.5
Burbank - 8.4
Burnham - 8.4
Burr Ridge - 8.5
Calumet City - 8.4
Calumet Park - 8.4
Chicago - 8.4
Chicago Heights - 8.4
Chicago Ridge - 8.4
Cicero - 8.4
Country Club Hills - 8.4
Countryside - 8.5
Crestwood - 8.4
Crete - 8.4
Deerfield - 8.4
Deer Park - 8.5
Des Plaines - 8.5
Dixmoor - 8.4
Dolton - 8.4
East Dundee - 8.5
East Hazel Crest - 8.4
Elgin - 8.5
Elk Grove Village - 8.5
Elmhurst - 8.5
Elmwood Park - 8.5
Evanston - 8.5
Evergreen Park - 8.4
Flossmoor - 8.4
Ford Heights - 8.4
Forest Park - 8.4
Forest View - 8.4
Frankfort - 8.4
Frankfort Square - 8.4
Franklin Park - 8.5
Glencoe - 8.4
Glenview - 8.5
Glenwood - 8.4
Golf - 8.5
Hanover Park - 8.5
Harvey - 8.4
Harwood Heights - 8.5
Hazel Crest - 8.4
Hickory Hills - 8.4
Highland Park - 8.4
Hillside - 8.5
Hinsdale - 8.5
Hodgkins - 8.4
Hoffman Estates - 8.5
Homer Glen - 8.4
Hometown - 8.4
Homewood - 8.4
Indian Head Park - 8.5
Inverness - 8.5
Itasca - 8.5
Justice - 8.4
Kenilworth - 8.5
La Grange - 8.4
La Grange Park - 8.4
Lansing - 8.4
Lemont - 8.5
Lincolnwood - 8.5
Lockport - 8.4
Long Grove - 8.5
Lynwood - 8.4
Lyons - 8.4
Markham - 8.4
Matteson - 8.4
Maywood - 8.5
Melrose Park - 8.5
Merrionette Park - 8.4
Midlothian - 8.4
Morton Grove - 8.5
Mount Prospect - 8.5
Niles - 8.5
Norridge - 8.5
Northbrook - 8.4
Northfield - 8.5
Northlake - 8.5
North Riverside - 8.4
Oak Brook - 8.5
Oak Forest - 8.4
Oak Lawn - 8.4
Oak Park - 8.5
Olympia Fields - 8.4
Orland Hills - 8.4
Orland Park - 8.4
Palatine - 8.5
Palos Heights - 8.4
Palos Hills - 8.4
Palos Park - 8.5
Park Forest - 8.4
Park Ridge - 8.5
Phoenix - 8.4
Plum Valley - 8.4
Posen - 8.4
Prospect Heights - 8.5
Richton Park - 8.4
Riverdale - 8.4
River Forest - 8.5
River Grove - 8.5
Riverside - 8.4
Riverwoods - 8.5
Robbins - 8.4
Rolling Meadows - 8.5
Romeoville - 8.5
Roselle - 8.5
Rosemont - 8.5
Sauk Village - 8.4
Schaumburg - 8.5
Schiller Park - 8.5
Skokie - 8.5
South Barrington - 8.5
South Chicago Heights - 8.4
South Holland - 8.4
Steger - 8.4
Stickney - 8.4
Stone Park - 8.5
Streamwood - 8.5
Summit - 8.4
Thornton - 8.4
Tinley Park - 8.4
University Park - 8.4
Westchester - 8.5
Western Springs - 8.5
Wheeling - 8.5
Willow Springs - 8.5
Wilmette - 8.5
Winnetka - 8.5
Wood Dale - 8.5
Woodridge - 8.5
Worth - 8.4
Dyer - 8.4
Hammond - 8.4
Munster - 8.4