Cook County, IL: Current UV Index and Hourly Forecast

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As of 2:24 PM CST on February 28, 2026, all 119 cities in Cook County, IL in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Orland Park, IL with a reading of 1.3.

Over the next 24 hours, the highest UV Index reading in Cook County, IL is expected to be 3.5 in Orland Park between 12:00 PM - 1:00 PM CST tomorrow.

Search Cities in Cook County, IL

Current UV Index in Cities in Cook County, IL

• Alsip - 1.2
• Arlington Heights - 1.1
• Barrington - 0.9
• Barrington Hills - 0.9
• Bedford Park - 1.2
• Bellwood - 1.1
• Berkeley - 1.1
• Berwyn - 1.2
• Blue Island - 1.2
• Bridgeview - 1.2
• Broadview - 1.2
• Brookfield - 1.2
• Burbank - 1.2
• Burnham - 1.2
• Calumet City - 1.3
• Calumet Park - 1.2
• Chicago - 1.2
• Chicago Heights - 1.3
• Chicago Ridge - 1.2
• Cicero - 1.2
• Country Club Hills - 1.3
• Countryside - 1.3
• Crestwood - 1.2
• Des Plaines - 1.1
• Dixmoor - 1.2
• Dolton - 1.2
• East Hazel Crest - 1.3
• Elk Grove Village - 1.1
• Elmwood Park - 0.9
• Evanston - 0.9
• Evergreen Park - 1.2
• Flossmoor - 1.3
• Ford Heights - 1.3
• Forest Park - 1.2
• Forest View - 1.2
• Franklin Park - 1.1
• Glencoe - 0.9
• Glenview - 0.9
• Glenwood - 1.3
• Golf - 0.9
• Harvey - 1.3
• Harwood Heights - 0.9
• Hazel Crest - 1.3
• Hickory Hills - 1.2
• Hillside - 1.3
• Hodgkins - 1.2
• Hoffman Estates - 1.1
• Hometown - 1.2
• Homewood - 1.3
• Indian Head Park - 1.3
• Inverness - 1.1
• Justice - 1.2
• Kenilworth - 0.9
• La Grange - 1.2
• La Grange Park - 1.2
• Lansing - 1.3
• Lemont - 1.3
• Lincolnwood - 0.9
• Lynwood - 1.3
• Lyons - 1.2
• Markham - 1.3
• Matteson - 1.3
• Maywood - 0.9
• McCook - 1.2
• Melrose Park - 0.9
• Merrionette Park - 1.2
• Midlothian - 1.2
• Morton Grove - 0.9
• Mount Prospect - 1.1
• Niles - 0.9
• Norridge - 0.9
• North Riverside - 1.2
• Northbrook - 0.9
• Northfield - 0.9
• Northlake - 1.1
• Oak Forest - 1.3
• Oak Lawn - 1.2
• Oak Park - 0.9
• Olympia Fields - 1.3
• Orland Hills - 1.3
• Orland Park - 1.3
• Palatine - 1.1
• Palos Heights - 1.2
• Palos Hills - 1.2
• Palos Park - 1.3
• Park Forest - 1.3
• Park Ridge - 0.9
• Phoenix - 1.3
• Posen - 1.2
• Prospect Heights - 1.1
• Richton Park - 1.3
• River Forest - 0.9
• River Grove - 0.9
• Riverdale - 1.2
• Riverside - 1.2
• Robbins - 1.2
• Rolling Meadows - 1.1
• Rosemont - 0.9
• Sauk Village - 1.3
• Schaumburg - 1.1
• Schiller Park - 0.9
• Skokie - 0.9
• South Barrington - 1.1
• South Chicago Heights - 1.3
• South Holland - 1.3
• Steger - 1.3
• Stickney - 1.2
• Stone Park - 1.1
• Streamwood - 1.1
• Summit - 1.2
• Thornton - 1.3
• Tinley Park - 1.3
• Westchester - 1.3
• Western Springs - 1.3
• Wheeling - 0.9
• Willow Springs - 1.3
• Wilmette - 0.9
• Winnetka - 0.9
• Worth - 1.2