In September, the weather in Sumon Toolaylyg is typically cold. Average daily high temperature in September is about 6 degrees above zero. On average, Sumon Toolaylyg has 16 rainy, 7 sunny, 5 partly cloudy, and 2 cloudy days in September. The rains are usually moderate. September as well as January, February, April, and May is considered the most uncomfortable time to visit Sumon Toolaylyg.