December in Puerto Aisen is the windiest month of the year. In December, the weather in Puerto Aisen is typically warm. Average daily high temperature in December is about 10 degrees above zero. On average, Puerto Aisen has 26 rainy, 4 sunny, and 1 cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Puerto Aisen.