UV Index

The UV index is a measure of the level of UV radiation in relation to sunburn (erythema). It is given for clear-sky conditions at local solar noon, i.e. when the Sun is highest in the sky. 

World Health Organisation - UV Index

(c) KNMI / ESA - We would like to express our thanks to KNMI / ESA for the assistance in the preparation of this information.
www.temis.nl/uvradiation