On the mountain, with a cool breeze and some cloud cover, UV radiation is sometimes underestimated. The cloud cover offers no protection, the UV radiation is indeed reduced, but still comes through to the (unprotected) skin. At high altitudes, the skin must therefore be protected from UVA & UVB rays, perhaps even from cold, wind, rain and snow. Mountain enthusiasts know that snow reflects up to 90% of the incoming sun's rays and thus amplifies UV radiation. Adjust the sun protection factor to the altitude, because the UVB intensity increases with altitude. So please make sure that all parts of the body, which come into contact with the sun (attention in the shade you get color), are protected. Take particular care to protect the face, nose bridge, neck, arms, ears and lips. Incidentally, beta carotene protects from the inside, for example contained in dried apricots and fresh carrots ... just as a snack idea.
The measurement of UV radiation has been carried out at the Sonnblick Observatory for many years by the BOKU Vienna and project partners. The current measures can be found here: UV index Sonnblick. The exposure to ultraviolet (UV) radiation is based on an internationally standardized UV index. The UV index is a measure of the intensity of sunburn UV radiation.
All links can also be found in German on the ZAMG website: https://www.zamg.ac.at/cms/de/umwelt/umwelt-aktuell/uv-index or the current UV map can be found here: http: / /www2.i-med.ac.at/uv-index/en/online_map_de.html (a project of the Section for Biomedical Physics of the Medical University of Innsbruck and Division IV / 1 Coordination Climate Policy of the Federal Ministry of Sustainability and Tourism).