May in Bolshoy Kashelak is the windiest month of the year. In May, the weather in Bolshoy Kashelak is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Bolshoy Kashelak has 13 rainy, 7 cloudy, 6 partly cloudy, and 5 sunny days in May. The rains are usually light.