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.)
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:
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