Gniezno's winters are cold and variable, with temperatures often dropping below freezing but occasionally rising into double digits. Spring arrives in March, bringing mild temperatures that gradually warm up throughout the month, with April seeing more consistent highs around 20°C. Summer months of June and July are warm to hot, with temperatures frequently reaching the mid-30s, while August is slightly cooler. Autumn is cool and pleasant, with September's temperatures often hovering around 15°C, before dropping into November's chillier range. Winters return in December, mirroring January's cold and unpredictable nature.