December in Gdansk is the rainiest and the windiest month of the year. In December, the weather in Gdansk is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Gdansk has 18 rainy, 8 cloudy, 2 sunny, 2 partly cloudy, and 1 snowy day in December. The rains are usually moderate. December as well as February and November is considered the most uncomfortable time to visit Gdansk.