August in Sumon Saryg-Sepsky is the rainiest month of the year. In August, the weather in Sumon Saryg-Sepsky is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Sumon Saryg-Sepsky has 15 partly cloudy, 14 sunny, and 2 rainy days in August. The rains are usually light.