Ganzhou has a humid subtropical climate (Köppen Cfa) affected by the East Asian monsoon. Spring begins especially gloomy, and from March to June each of the months averages more than 180 mm (7.1 in) of rainfall.
Summer is especially sunny, long, humid and very hot.
Autumn is warm and relatively dry.
Ganzhou has a cool and drier winters with occasional cold snaps, featuring some of the highest summertime temperatures nationally outside of the Turpan Depression in Xinjiang.