Zhoushan experiences a mild winter, with temperatures ranging from -8°C to 22°C in January and February, averaging around 7-11°C. As spring approaches, the temperature gradually warms up, reaching an average of 13°C by March and 17°C by April. Summer is hot and humid, with July being the warmest month, averaging 29°C, while autumn brings a slight cooling trend, with temperatures dropping back down to around 12-18°C by October. In the winter months, December sees temperatures dip to as low as -1°C, but still average around 9°C.