October in Isafjordur is the rainiest month of the year. In October, the weather in Isafjordur is typically cold. Average daily high temperature in October is about 3 degrees above zero. On average, Isafjordur has 29 rainy, 1 sunny, and 1 cloudy day in October. The rains are usually heavy. October as well as January, April, May, and June is considered the most uncomfortable time to visit Isafjordur.