May in Sumon U-Shynaansky is the windiest month of the year. In May, the weather in Sumon U-Shynaansky is typically cold. Average daily high temperature in May is about 10 degrees above zero. On average, Sumon U-Shynaansky has 21 rainy, 5 cloudy, 4 sunny, and 1 partly cloudy day in May. The rains are usually moderate. May as well as January, February, April, and June is considered the most uncomfortable time to visit Sumon U-Shynaansky.