In September, the weather in Sevast'yanovo is typically warm. Average daily high temperature in September is about 13 degrees above zero. On average, Sevast'yanovo has 12 rainy, 8 cloudy, 8 partly cloudy, and 2 sunny days in September. The rains are usually moderate. September as well as January, April, October, and November is considered the most uncomfortable time to visit Sevast'yanovo.