May 22, 2015; 6:12 AM ET
Temperatures will remain on a roller coaster ride around Philadelphia in the days leading up to Memorial Day. more >
Warmer with sunshine mixing with some clouds; breezy this afternoon
Rises at 5:44 AM with 14:30 of sunlight, then sets at 8:14 PM
Rises at 9:57 AM with 14:10 of moolight, then sets at 12:07 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.