July 12, 2014; 8:59 AM ET
Strong thunderstorms will threaten Chicago this weekend before the city gets a taste of September. more >
Rises at 5:31 AM with 14:58 of sunlight, then sets at 8:29 PM
Rises at 9:54 PM with 11:37 of moolight, then sets at 9:31 AM
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.