"Bulgaria has a temperate climate, with cool and damp winters, very hot and dry summers, and Mediterranean influence along the Black Sea coast. The barrier effect of the Balkan Mountains influences climate throughout the country: northern Bulgaria gets slightly cooler and receives more rain than the southern regions.
Precipitation in Bulgaria averages about 630 millimetres per year. Drier areas include Dobrudzha and the northern coastal strip, while the higher parts of the Rila and Stara Planina mountains receive the highest levels of precipitation. In summer, temperatures in the south of Bulgaria often exceed 40 degrees Celsius, but remain cooler by the coast. A site near Plovdiv has recorded the highest known temperature: 46.7 degrees Celsius." - in: wikipedia.