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Humid with periods of sun
Sunny, very warm and humid
A push of summery heat and humidity will arrive in Harrisburg this week as September begins. 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.