December in Frombork is the rainiest and the windiest month of the year. In December, the weather in Frombork is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Frombork has 17 rainy, 7 cloudy, 3 sunny, 3 partly cloudy, and 1 snowy day in December. The rains are usually moderate. December as well as February, March, and November is considered the most uncomfortable time to visit Frombork.