What does the UV index mean?

The UV index is a standardized measurement indicating the strength of ultraviolet radiation from the sun at a particular location and time. It helps people understand how quickly unprotected skin can be affected by UV exposure. WeatherPerch displays the UV index as part of its location weather information. A low UV index generally represents less intense ultraviolet exposure, while higher values indicate a greater need for sun protection. The UV index can change throughout the day and is often strongest around the middle of the day when the sun is higher in the sky. If you are planning an outdoor activity, use the UV forecast together with temperature, wind, and other conditions when deciding how to prepare.