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 17 rainy, 5 cloudy, 4 sunny, and 4 partly cloudy days 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.