The highest day temperature in January 2026 was 34°F. The lowest night temperature was 10°F. The average values for day and night temperatures during January were 25.1°F и 22.1°F respectivly.

The average sea surface temperature in January 2026 for Gdynia was 36.7°F. The maximum and minimum values were 33.8°F and 40.0°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Gdynia is 1.5 in.

The average wind speed in January is 13.2 mph. It makes January one of the most windy months of the year for Gdynia.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Gdynia in January is 2.4 hours.