September in Laugarvatn is the rainiest month of the year. In September, the weather in Laugarvatn is typically cold. Average daily high temperature in September is about 7 degrees above zero. On average, Laugarvatn has 26 rainy, 2 sunny, and 2 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 Laugarvatn.