March in Adak Island is the rainiest month of the year. In March, the weather in Adak Island is typically cold. Average daily high temperature in March is about 2 degrees above zero. On average, Adak Island has 29 rainy, 1 sunny, and 1 cloudy day in March. The rains are usually heavy. March as well as January, February, April, and May is considered the most uncomfortable time to visit Adak Island.