Winters in Wejherowo, Poland are cold and unpredictable, with temperatures often fluctuating between freezing and mild. January is the coldest month, with average temperatures ranging around -1°C, while February and December also experience similar conditions. Spring brings a gradual warming trend, with March and April temperatures slowly rising to around 3-5°C on average. Summer months are warm but not hot, with June and July averaging around 18-20°C, while August cools slightly. Autumn is characterized by decreasing temperatures, returning to near-freezing levels in October and November before dropping again in December.