Der UV-Index gibt die sonnenbrandwirksame solare Bestrahlungsstärke an und variiert durch Faktoren wie:
• Sunshine (with geographical latitude, day and season)
• The geographical altitude
• The thickness of the ozone layer
In predictions, the maximum expected value for the day is indicated. In the German region UV indices between five and eight are usual in the months from May to August. Around 10 and 16 o’clock, the values are typically about half as large.
= necessary light protection factor
Maximum values for the respective days of the year, can be predicted worldwide and should be taken into account, for example, during holiday planning. Here you can find information on the UV indices that are predicted worldwide.