May in Puerto Aisen is the cloudiest month of the year. In May, the weather in Puerto Aisen is typically cold. Average daily high temperature in May is about 6 degrees above zero. On average, Puerto Aisen has 18 rainy, 10 cloudy, 2 partly cloudy, and 1 sunny day in May. The rains are usually heavy. May as well as January, February, March, and April is considered the most uncomfortable time to visit Puerto Aisen.