UV Index

The 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 Index

The 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.)

ZIP Code:
OR
City Name:
And
State:

You can also look up UV Index using the following resources.

• Text Bulletin (A two-column text listing of the original 58 UV Index cities and their corresponding daily forecast values.)
  
• Cities Map (A map of the U.S. with daily UV Index forecast values for the original 58 cities.)
  
• Contoured Map (A map of the U.S. that shows contours of daily UV Index forecast values.)
  

The following UV Index archives and other information are available from National Weather Service:

• Past text bulletins
  
• Graphs of yearly values for each city
  
• Information about UV radiation and how it varies
  
• General UV Index information

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