May in Sumon Kok-Khaaksky is the windiest and the cloudiest month of the year. In May, the weather in Sumon Kok-Khaaksky is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Sumon Kok-Khaaksky has 11 rainy, 8 partly cloudy, 7 sunny, and 5 cloudy days in May. The rains are usually light.