The intensity of the sun, as well as the individual skin type, is crucial when selecting suitable UV protection. The international UV index (UVI) provides information on the intensity of UV radiation in a specific location. In Germany, for example, UV indices between 5 and 8 are common at midday from May to August.
The UV index is dependent on the time of day, the longitude and latitude, the time of year, ozone levels and cloud cover. Reflections from the sand and snow also affect the UVI level.
The daily UVI forecast is published on the Internet by, amongst others, the Deutscher Wetterdienst [German Meteorological Service] at www.wettergefahren.de and www.uv-index.de for Germany and Europe and global by http://orias.dwd.de/promote/index.jsp.
Recommended sun protection factor (SPF) by index and skin type
|UV index||Children‘s skin||Skin type I||Skin type II||Skin type III||Skin type IV|
|3 - 4||UPF 20||UPF 20||UPF 15||UPF 10||UPF 5 - 10|
|5 - 6||UPF 20 - 40||UPF 20 - 40||UPF 20 - 40||UPF 20||UPF 10|
|7 - 8||UPF 60 - 80||UPF 60 - 80||UPF 40 - 60||UPF 40||UPF 20|
|9 and above||UPF 80||UPF 80||UPF 60 - 80||UPF 60||UPF 40|