In May, the weather in Port-Stenli is typically cold. Average daily high temperature in May is about 7 degrees above zero. On average, Port-Stenli has 13 rainy, 11 cloudy, 4 sunny, and 3 partly cloudy days in May. The rains are usually light. May as well as February, April, June, and July is considered the most uncomfortable time to visit Port-Stenli.