Updated January 31, 2012

The UV Index - How It Works, Why It’s Important

The UV Index, issued daily by Environment Canada, is a simple measure of the intensity of the sun’s ultraviolet (UV) radiation.

The index is a useful tool to alert you to the need for sun protection. The higher the index, the more careful you have to be when outside in the sun.

The index is featured in the media (print, TV, radio, and Internet) when it is expected to reach 3 or higher, which is when sun protective actions are needed.

In B.C., you can find the daily index at Environment Canada’s website.