In April, UV radiation in Germany can already assume medium values.
Up to the end of April at noon time the height of the sun rises up to 50° in
the North, and up to 54° in the South. Since UV radiation at ground level highly depends
on the altitude of the sun, in case of cloudless skies UV index reaches values of 5
in Northern Germany and of 6 in Southern germany.
Also because in April the skin often is not used to UV radiation,
protective measures are required in any case...
