May in Sofiysk is the rainiest and the windiest month of the year. In May, the weather in Sofiysk is typically warm. Average daily high temperature in May is about 9 degrees above zero. On average, Sofiysk has 17 rainy, 5 cloudy, 5 partly cloudy, and 4 sunny days in May. The rains are usually moderate. May as well as January, February, March, and September is considered the most uncomfortable time to visit Sofiysk.