December weather forecast
Gdynia, Poland

December greets Gdynia with the full force of winter, as the mercury drops further, recording an average high of 4.3°C (39.7°F). Snowfall reappears, gracing the city with a white mantle on approximately seven days. The winter chill, while biting, brings an air of festivity to the town, as preparations for the holiday season get underway. While the weather can be quite cold, the warmth of holiday activities provides an enticing item on Gdynia's menu. December’s winter palette wraps up the year-end, setting the stage for the new year in Gdynia.

Temperature

In December, the meteorological conditions in Gdynia change slightly, with the average high-temperature moving from a frosty 7.6°C (45.7°F) in November to an icy 4.3°C (39.7°F). In December, Gdynia's nighttime temperatures demonstrate a slight decrease, stabilizing at an average of 0.6°C (33.1°F).

Humidity

December is the most humid month in Gdynia, with an average relative humidity of 87%.

Rainfall

In December, the rain falls for 16 days. Throughout December, 58mm (2.28") of precipitation is accumulated. Throughout the year, in Gdynia, there are 183 rainfall days, and 697mm (27.44") of precipitation is accumulated.

Snowfall

Months with snowfall in Gdynia are January through April, October through December. In December, in Gdynia, snow falls for 7 days. Throughout the year, there are 50 snowfall days.

Sea temperature

In December, the average sea temperature is 5.9°C (42.6°F).
Note: Swimming in 5.9°C (42.6°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

With an average of 7h and 24min of daylight, December has the shortest days of the year in Gdynia.
On the first day of the month, sunrise is at 07:44 and sunset at 15:25. On the last day of December, sunrise is at 08:07 and sunset at 15:30 CET.