Nagasaki's climate is characterized by mild winters and warm summers. In the winter months of January, February, and December, temperatures range from just below freezing to mid-teens Celsius, with average highs around 7-13°C. Spring arrives in March, bringing warmer temperatures that slowly rise throughout April and May, with average highs reaching up to 19°C by late spring. Summer months of June to August are hot and humid, with temperatures often soaring above 30°C, but September sees a slight cooling trend as autumn begins. Autumn's transition is relatively short-lived, with October's temperatures dropping back down to around 5-20°C before the winter chill sets in again.