In April, the weather in Vestmannaeyjar is typically cold. Average daily high temperature in April is about 6 degrees above zero. On average, Vestmannaeyjar has 21 rainy, 6 sunny, 2 partly cloudy, and 1 cloudy day in April. The rains are usually heavy. April as well as January, February, March, and May is considered the most uncomfortable time to visit Vestmannaeyjar.