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Colder with periods of sun
Sunny and bitterly cold
Mostly sunny and not as cold
Chilly with some sun
While frigid conditions will encompass the Chicago area over the next couple of days, the weekend will offer a break from the bitter cold. more >
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.