September in Novaya Lyalya is the rainiest month of the year. In September, the weather in Novaya Lyalya is typically warm. Average daily high temperature in September is about 12 degrees above zero. On average, Novaya Lyalya has 14 cloudy, 13 rainy, 2 sunny, and 1 partly cloudy day in September. The rains are usually moderate. September as well as January, February, April, and October is considered the most uncomfortable time to visit Novaya Lyalya.