In April, the weather in Barter Island is typically freezing. Average daily high temperature in April is about 9 degrees below zero. On average, Barter Island has 26 cloudy, 2 sunny, 1 snowy, and 1 partly cloudy day in April. The snowfalls are usually light. April as well as January, February, March, and November is considered the most uncomfortable time to visit Barter Island.