Sofia is the capital and largest city of Bulgaria. 1.26 million people live in the city and 1.68 million people live in its metropolitan area. The city is at the foot of Vitosha Mountain in the western part of the country. Being in the centre of the Balkan peninsula, it is midway between the Black Sea and the Adriatic Sea, whereas the Aegean Sea is the closest to it.
Sofia’s architecture combines a wide range of architectural styles, some of which are aesthetically incompatible. These vary from Christian Roman architecture and medieval Bulgar fortresses to Neoclassicism and prefabricated Socialist-era apartment blocks. A number of ancient Roman, Byzantine and medieval Bulgarian buildings are preserved in the centre of the city. These include the 4th century Rotunda of St. George, the walls of the Serdica fortress and the partially preserved Amphitheatre of Serdica.
Sofia has a humid continental climate with an average annual temperature of 10.6 °C (51.1 °F).
Winters are cold and snowy. In the coldest days temperatures can drop below −15 °C (5 °F), most notably in January. The lowest recorded temperature is −28.3 °C (−19 °F) (24 January 1942).
Summers are warm and sunny. In summer, the city generally remains slightly cooler than other parts of Bulgaria, due to its higher altitude. However, the city is also subjected to heat waves with high temperatures reaching or exceeding 35 °C (95 °F) in the hottest days, particularly in July and August. The highest recorded temperature is 41 °C (106 °F) (5 July 2000 and 24 July 2007).
Springs and autumns in Sofia are relatively short with variable and dynamic weather, intensive storms, sudden cold or heat waves.
Source: Sofia Climate