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 uv index


What exactly is the UV Index? A dermatologist explains.

Popular Science

What exactly is the UV Index? The measurement has nothing to do with how hot it is outside. Wearing sunscreen all year round can help protect your skin from harmful UV rays. Breakthroughs, discoveries, and DIY tips sent every weekday. As of 2:19 p.m. EST today, it is officially autumn in the Northern Hemisphere .