UV Index Today in Cook County, Illinois (IL) Wednesday, November 4, 2026 -11:15 AM CST (GMT-6) The average maximum UV Index today across 177 locations in Cook County, Illinois (IL) , is 1.5. The highest projected maximum is 2.1 in Bremen at 11:00 AM CST, while the lowest projected maximum is 0.9 in Wheeling at 1:00 PM CST.
Tomorrow, the average maximum UV Index across those same locations is expected to be 0.8. The highest projected maximum is 1.8 in Thornton at 11:00 AM CST, and the lowest projected maximum is 0.2 in Barrington at 10:00 AM CST.
29 County Subdivisions in Cook County, Illinois (IL) Maximum UV Index Today
Barrington - 1.2
Berwyn - 1.9
Bloom - 1.7
Bremen - 2.1
Calumet - 1.9
Cicero - 1.9
Elk Grove - 0.9
Hanover - 1.2
Lemont - 1
Leyden - 1.2
Lyons - 1.9
Maine - 1.2
New Trier - 1.2
Niles - 1.2
Northfield - 1.2
Norwood Park - 1.2
Oak Park - 1.2
Orland - 2.1
Palatine - 0.9
Palos - 1.9
Proviso - 1.9
Rich - 2.1
River Forest - 1.2
Riverside - 1.9
Schaumburg - 0.9
Stickney - 1.9
Thornton - 1.7
Wheeling - 0.9
Worth - 1.9148 Places in Cook County, Illinois (IL) Maximum UV Index Today
Alsip - 1.9
Arlington Heights - 0.9
Barrington - 1.3
Barrington Hills - 1.3
Bartlett - 1.2
Bedford Park - 1.9
Bellwood - 0.9
Bensenville - 0.9
Berkeley - 0.9
Berwyn - 1.9
Blue Island - 1.9
Bridgeview - 1.9
Broadview - 1.9
Brookfield - 1.9
Buffalo Grove - 1
Burbank - 1.9
Burnham - 1.8
Burr Ridge - 1
Calumet City - 1.7
Calumet Park - 1.9
Chicago - 1.9
Chicago Heights - 2.1
Chicago Ridge - 1.9
Cicero - 1.9
Country Club Hills - 2.1
Countryside - 1
Crestwood - 1.9
Crete - 1.7
Deerfield - 1
Deer Park - 1
Des Plaines - 0.9
Dixmoor - 1.9
Dolton - 1.8
East Dundee - 1.2
East Hazel Crest - 2.1
Elgin - 1.2
Elk Grove Village - 0.9
Elmhurst - 0.9
Elmwood Park - 1.2
Evanston - 1.2
Evergreen Park - 1.9
Flossmoor - 2.1
Ford Heights - 1.7
Forest Park - 1.9
Forest View - 1.9
Frankfort - 2.1
Frankfort Square - 2.1
Franklin Park - 0.9
Glencoe - 1
Glenview - 1.2
Glenwood - 1.7
Golf - 1.2
Hanover Park - 1.2
Harvey - 2.1
Harwood Heights - 1.2
Hazel Crest - 2.1
Hickory Hills - 1.9
Highland Park - 1
Hillside - 1
Hinsdale - 1
Hodgkins - 1.9
Hoffman Estates - 1.2
Homer Glen - 1.2
Hometown - 1.9
Homewood - 2.1
Indian Head Park - 1
Inverness - 0.9
Itasca - 0.9
Justice - 1.9
Kenilworth - 1.2
La Grange - 1.9
La Grange Park - 1.9
Lansing - 1.7
Lemont - 1
Lincolnwood - 1.2
Lockport - 1.2
Long Grove - 1
Lynwood - 1.7
Lyons - 1.9
Markham - 2.1
Matteson - 2.1
Maywood - 1.2
Melrose Park - 1.2
Merrionette Park - 1.9
Midlothian - 1.9
Morton Grove - 1.2
Mount Prospect - 0.9
Niles - 1.2
Norridge - 1.2
Northbrook - 1
Northfield - 1.2
Northlake - 0.9
North Riverside - 1.9
Oak Brook - 1
Oak Forest - 2.1
Oak Lawn - 1.9
Oak Park - 1.2
Olympia Fields - 2.1
Orland Hills - 2.1
Orland Park - 2.1
Palatine - 0.9
Palos Heights - 1.9
Palos Hills - 1.9
Palos Park - 1
Park Forest - 2.1
Park Ridge - 1.2
Phoenix - 2.1
Plum Valley - 1.7
Posen - 1.9
Prospect Heights - 0.9
Richton Park - 2.1
Riverdale - 1.9
River Forest - 1.2
River Grove - 1.2
Riverside - 1.9
Riverwoods - 1
Robbins - 1.9
Rolling Meadows - 0.9
Romeoville - 1
Roselle - 0.9
Rosemont - 1.2
Sauk Village - 1.7
Schaumburg - 0.9
Schiller Park - 1.2
Skokie - 1.2
South Barrington - 1.2
South Chicago Heights - 2.1
South Holland - 1.7
Steger - 1.7
Stickney - 1.9
Stone Park - 0.9
Streamwood - 1.2
Summit - 1.9
Thornton - 1.7
Tinley Park - 2.1
University Park - 2.1
Westchester - 1
Western Springs - 1
Wheeling - 1
Willow Springs - 1
Wilmette - 1.2
Winnetka - 1.2
Wood Dale - 0.9
Woodridge - 1
Worth - 1.9
Dyer - 1.7
Hammond - 1.7
Munster - 1.7