October 23, 2014; 11:44 AM ET
Temperatures will gradually rise into the weekend in Chicago. more >
Some sun, then increasing clouds
A passing shower this evening; otherwise, considerable cloudiness
Rises at 7:10 AM with 10:46 of sunlight, then sets at 5:56 PM
Rises at 6:49 AM with 11:08 of moolight, then sets at 5:57 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.