Bremerhaven's winters are typically chilly and unpredictable, with temperatures often dropping below freezing but occasionally rising into the double digits. Spring brings a slow warming trend, with March marking a significant increase in temperatures as it approaches summer-like highs. Summer itself is mild and pleasant, with average high temperatures ranging from 19 to 28 degrees Celsius throughout June and July. Autumn is also mild, with September often feeling like an extension of summer before cooling down towards the end of October. Winters are generally the coldest period, but still experience occasional warm spells that can push temperatures into the mid-teens.