October 8, 2015; 1:54 PM ET
Chicago will experience a fluctuation in temperatures through the weekend. more >
Some sun, then clouds; breezy and warm with a shower or thunderstorm in spots late this afternoon
A shower or thunderstorm in spots this evening; otherwise, mostly cloudy
Rises at 6:56 AM with 11:26 of sunlight, then sets at 6:22 PM
Rises at 2:49 AM with 13:32 of moolight, then sets at 4:21 PM
Nov 12, 2012; 5:00 AM ET The UV index has been around since the early 1990s. It was created to help you plan outdoor activities in hopes to limit overexposure to the sun. Jeannette Calle has more.