Winters in Sheboygan are long and cold, with temperatures often dropping below freezing for several months. January is the coldest month, with temperatures averaging around -3°C, while February is even chillier, averaging -7°C. Spring brings a slow warming trend, with March temperatures rising to an average of 3°C, and April enjoying highs of up to 18°C. Summer months are mild, with July being the warmest, averaging 21°C, but temperatures can still drop below 13°C on some days. Autumn sees a return to cooler temperatures, with October averaging 14°C, before dropping back down into winter's chill by November and December.