UV Index 🇧🇬Bulgaria

Bulgaria lies in southeastern Europe between roughly 41.2°N and 44.2°N, giving it noticeably higher midday sun angles than most of the continent. Wikipedia's Geography of Bulgaria describes a country split by the Balkan range (Stara Planina) running east–west, with the Rila, Pirin and Rhodope massifs in the southwest, the Danubian plain to the north, the Upper Thracian lowlands to the south, and a 354 km Black Sea coast. This combination of latitude, exposed plains and high mountains produces a broad UV regime that varies sharply by elevation and season, according to WHO ambient-UV guidance.

A unique feature is Musala in the Rila mountains: at 2,925 m it is the highest peak in the entire Balkan Peninsula, and Wikipedia notes that thinner air at such altitudes meaningfully increases ultraviolet intensity. Bulgaria's Climate (Wikipedia) classifies the country as a temperate-continental and Mediterranean hybrid, with hot, relatively dry summers along the Thracian lowlands and Black Sea coast where summer UV index commonly reaches 7–8. The National Institute of Meteorology and Hydrology (NIMH, meteo.bg) runs the national observation network, including stations in the Rhodope and Rila ranges used for atmospheric and ozone-related monitoring.

Bulgaria sits at #157 of 191 in the WHO's global ambient-UV ranking with about 2,331 J/m² of average daily UV, around the 18th percentile worldwide.