September in Qaqortoq is the rainiest month of the year. In September, the weather in Qaqortoq is typically cold. Average daily high temperature in September is about 7 degrees above zero. On average, Qaqortoq has 13 rainy, 7 partly cloudy, 6 sunny, and 4 cloudy days in September. The rains are usually heavy. September as well as April, May, June, and July is considered the most uncomfortable time to visit Qaqortoq.