In September, the weather in Akureyri is typically cold. Average daily high temperature in September is about 7 degrees above zero. On average, Akureyri has 15 rainy, 7 cloudy, 6 partly cloudy, and 2 sunny 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 Akureyri.