Harbin's winters are bitterly cold, with temperatures often plummeting below -30°C in January and February. Spring is a gradual warming period, with March bringing the first hints of mildness and April ushering in more consistent warmth. Summer months are warm to hot, with July being the peak month at around 26°C on average. Autumn brings another cooling trend, but temperatures rarely drop below -10°C until November. The cold returns with December, signaling the start of a new cycle of harsh winters.