 Jiangcheng has latitude range of 22°20'−22°36' N and longitude range of 101°14'−102°19' E. Its seat, the town of Menglie (), has an elevation of .Located at an altitude of above , Jiangcheng, as with much of southern Yunnan, has a warm humid subtropical climate (Köppen "Cwa"), with muddled distinction between the seasons and daytime temperatures remaining warm year-round.Highs peak in April and May before the core of the rainy season and reach a minimum in December; however, the warmest and coolest months are June and December, respectively at and ; the annual mean is .