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UV IndexThe ozone layer shields the Earth from harmful UV radiation. Ozone depletion, as well as seasonal and weather variations, cause different amounts of UV radiation to reach the Earth at any given time. Developed by the National Weather Service (NWS) and EPA, the UV Index predicts the next day's ultraviolet radiation levels on a 1-11+ scale, helping people determine appropriate sun-protective behaviors. Guidelines for reporting the UV Index have been revised according to guidance from the World Health Organization. More information is available on the EPA Launches Revised UV Index page. Today's UV IndexThe UV Index is calculated daily. Enter your zip code or city and state below for today's UV Index in your area. (Not available for Alaska and Hawaii.) You can also look up UV Index using the following resources.
The following UV Index archives and other information are available from National Weather Service:
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