Nanjing's winters are chilly, with temperatures often dropping below freezing in January and December, averaging around 5°C and 6°C respectively. As spring arrives, temperatures gradually rise, reaching an average of 16°C in April and 22°C in May. Summer is warm to hot, with July being the warmest month, averaging 28°C. Autumn brings a welcome respite from the heat, with temperatures cooling down to around 19°C by October. In contrast, winter months are characterised by cooler temperatures, while spring and autumn have mild conditions overall.