September in Aleksanldrovsk-Sahalinskiy is the sunniest month of the year. In September, the weather in Aleksanldrovsk-Sahalinskiy is typically warm. Average daily high temperature in September is about 14 degrees above zero. On average, Aleksanldrovsk-Sahalinskiy has 11 rainy, 10 sunny, 6 partly cloudy, and 3 cloudy days in September. The rains are usually moderate.