October in Gdynia is the rainiest month of the year. In October, the weather in Gdynia is typically warm. Average daily high temperature in October is about 12 degrees above zero. On average, Gdynia has 16 rainy, 8 partly cloudy, 4 sunny, and 3 cloudy days in October. The rains are usually moderate. October as well as January, February, March, and April is considered the most uncomfortable time to visit Gdynia.