September in Bolgar is the rainiest month of the year. In September, the weather in Bolgar is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Bolgar has 14 rainy, 7 cloudy, 6 sunny, and 3 partly cloudy days in September. The rains are usually moderate. September as well as January, February, March, and April is considered the most uncomfortable time to visit Bolgar.