The ultraviolet index, or UV index, is an international standard measurement of the strength of the sunburn -producing ultraviolet (UV) radiation at a particular place and time.

Apr 23, 2025 · The UV Index (UVI) is a number that tells you how strong the sun’s ultraviolet (UV) rays are on a given day. These rays are invisible, but they can damage your skin and eyes.

UV Index Information Answers to common questions about the UV Index and UV radiation A Guide to the UV Index Brochure developed by EPA for meteorologists, educators and public health officials on …

May 13, 2025 · 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.

Jun 20, 2022 · The UV Index is an important vehicle to raise public awareness of the risks of excessive exposure to UV radiation, and to alert people about the need to adopt protective measures.

The UV Index at any given time is presented as a number ranging from 0 to 14, representing values on a linear scale. A UV Index value of 0 means that there is no UV radiation, and a UV Index of 10 is …

The ultraviolet index scale (UV index scale) is a linear scale used to measure the intensity of ultraviolet radiation (UV) output from our Sun. The UV index scale has a numerical range between 0 and 11+, …

Nov 11, 2025 · The UV index measures how much UV radiation you'll be exposed to that day. You can wear sunscreen daily to protect your skin and lower your risk of heat-related complications.

Aug 12, 2025 · The UV Index (or UVI) is a standard, international measure of ultraviolet radiation. Values start at zero and can rise above 10.

Feb 12, 2024 · The ultraviolet (UV) index is a number on a scale from 1-11+ that tells you how intense the UV rays from the sun are predicted to be at a particular time and place.