The UV Index

The Ultraviolet (UV) Index predicts the UV radiation levels on a 1 – 11+ scale. The UV Index provides a daily forecast of the expected intensity of UV radiation from the sun. Learn more about how the UV Index can be calculated and analyzed and sign up for UV index email alerts.

Install the UV index app on your mobile device:

• iPhone - Get App 
• Android - Get App

• Learn About the UV Index

  

  Learn more about the UV Index scale and how it's calculated.

  Learn more about the UV Index

• UV Index Scale

  

  Learn how to read the UV Index scale and tips for staying sun safe, including the Shadow Rule.

  Explore the UV Index Scale

• UV Index Applications

  

  • Envirofacts
  • UV Index Forecast
  • UV Index Forecast for US Cities

  Explore the UV Index Applications