January in Vestmannaeyjar is the rainiest and the windiest month of the year. In January, the weather in Vestmannaeyjar is typically cold. Average daily high temperature in January is about 5 degrees above zero. On average, Vestmannaeyjar has 26 rainy, 4 sunny, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Vestmannaeyjar.