Light from the sun contains UV radiation which can damage your skin. It’s important to remember that UV can’t be seen or felt, and cloud cover won’t necessarily reduce UV radiation levels. The UV index can be high even on cool and overcast days.
The UV index is a tool you can use to know when to protect yourself from UV radiation. When the UV index is 3 and above, sun protection is always needed. If you have very fair skin and will be in the sun for long periods (more than an hour), you may need protection even if the UV index is below 3.
For smartphone users, the Cancer Council’s free SunSmart app is a great way to check the UV Index.
*Very fair skinned people may still need protection if in the sun for more than an hour.