September in Lalsk is the rainiest month of the year. In September, the weather in Lalsk is typically warm. Average daily high temperature in September is about 11 degrees above zero. On average, Lalsk has 21 rainy, 8 cloudy, and 1 sunny 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 Lalsk.