The Global Solar UV Index describes the level of solar UV radiation at the Earth’s surface. The values of the index range from zero upward – the higher the index value, the greater the potential for damage to the skin and eye, and the less time it takes for harm to occur. In our latitude the UV index levels are higher in the summer.
The UV radiation levels, and therefore the values of the index, vary throughout the day, being at maximum during the four-hour period around solar noon.
The UV radiation causes skin burns and becomes dangerous for many people when the UV index rises higher than 6. People with sensitive skin type should already be careful when the UV index rises above 3-4.
Exposure categories for UV index values: