January in Isafjordur is the snowiest, the windiest, and the cloudiest month of the year. In January, the weather in Isafjordur is typically freezing. Average daily high temperature in January is about zero. On average, Isafjordur has 13 cloudy, 7 snowy, 7 partly cloudy, and 4 rainy days in January. The snowfalls are usually heavy. January as well as February, April, May, and June is considered the most uncomfortable time to visit Isafjordur.