Summers are quite 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  in the hottest days, particularly in July and August. The highest recorded temperature is  (5 July 2000 and 24 July 2007). The hottest recorded month was July 2012 with an average temperature of . The warmest year on record was 2019 with an annual temperature of .