September in Severo-Kurilsk is the sunniest month of the year. In September, the weather in Severo-Kurilsk is typically warm. Average daily high temperature in September is about 11 degrees above zero. On average, Severo-Kurilsk has 15 rainy, 7 cloudy, 5 sunny, and 3 partly cloudy days in September. The rains are usually heavy. September as well as May, October, and November is considered the most uncomfortable time to visit Severo-Kurilsk.