In September, the weather in Bolshoy Kashelak is typically warm. Average daily high temperature in September is about 11 degrees above zero. On average, Bolshoy Kashelak has 12 rainy, 8 sunny, 8 partly cloudy, and 2 cloudy days in September. The rains are usually moderate. September as well as January, February, April, and October is considered the most uncomfortable time to visit Bolshoy Kashelak.