UV Index
Sun Safety: UV Index
The UV Index is a measure of the intensity of the sun’s ultraviolet radiation in the sun burning spectrum. As the UV Index increases, the sun’s rays can affect your skin, eyes and immune system. Therefore, you need to take more precautions to protect yourself from the harmful rays.
Developed by the National Weather Service (NWS) and EPA, the UV Index predicts the next day's ultraviolet radiation levels on a 0-10+ scale, helping people determine appropriate sun-protective behaviors. Several fact sheets explain the UV Index and steps you can take to minimize the risks from overexposure to the sun's rays.