December in Port-Stenli is the rainiest month of the year. In December, the weather in Port-Stenli is typically warm. Average daily high temperature in December is about 12 degrees above zero. On average, Port-Stenli has 16 rainy, 12 partly cloudy, and 3 sunny days in December. The rains are usually moderate. December as well as January, February, March, and April is considered the most uncomfortable time to visit Port-Stenli.