The UV Index indicates the amount of UV radiation reaching earth at noontime. The index is based on a scale of 0 to 11+. It is determined for most ZIP codes in the United States. The higher the index number, the greater your UV exposure when you go outdoors.
The index appears in local newspapers, is regularly reported on TV and radio weather reports, and is available online at many weather sites or from the EPA (type in your ZIP code or city and state to get the forecast for your area).