Duisburg's winters are typically cool and sometimes frosty, with temperatures often below freezing in January and February. As spring approaches, temperatures gradually warm up, reaching averages around 12°C by May. Summer months bring pleasant highs, occasionally reaching the mid-30s Celsius in June, while July and August experience more moderate temperatures in the late teens to early twenties. Autumn is generally mild, with temperatures dropping back down to around 6°C by November. Winters return, bringing cooler temperatures, before the cycle begins again.