Castrop-Rauxel experiences a moderate climate with distinct seasonal variations. Winters are chilly, with temperatures often below freezing and occasional drops to as low as -15°C in February. As spring arrives, temperatures gradually rise, reaching averages around 6-11°C by May. Summers are mild, with July being the warmest month, averaging 18°C, but temperatures rarely exceed 27°C. Autumn brings a return to cooler temperatures, similar to those of winter, while springs and autumns have relatively stable temperature ranges.