In September, the weather in Paamiut is typically cold. Average daily high temperature in September is about 5 degrees above zero. On average, Paamiut has 12 rainy, 7 partly cloudy, 6 sunny, and 5 cloudy days in September. The rains are usually heavy. September as well as May, June, July, and August is considered the most uncomfortable time to visit Paamiut.