Situated to the south of the Yangtze River, Jiujiang has a subtropical climate. The average annual temperature is 17℃ (62.6℉). January is the coldest month with a mean temperature of about 5℃ (41℉), and July is the hottest month with a mean temperature of about 29℃ (84.2℉).

Since it is sultry and rainy in summer and cold in winter, the best time to visit Jiujiang is in late spring and autumn. However, the situation is different in Mt. Lushan, which has four distinct seasons. Therefore it is pleasant to visit anytime, depending on your preference. 

Detailed information about the Average, Maximun and Minimum Temperatures and the rainfall in Jiujiang.

Average Data	Jan	Feb	Mar	Apr	May	June
Rain (in)	2.1/2.2	3.5/3.6	5.0/5.1	6.9/7.0	7.7/7.8	8.2/8.3
Rain (mm)	50/55	90/95	130/135	175/180	195/200	210/215

Average Data	July	Aug	Sep	Oct	Nov	Dec
Rain (in)	5.2/5.3	4.5/4.6	3.2/3.3	2.8/2.9	2.5/2.6	1.7/1.8
Rain (mm)	130/135	115/120	80/85	70/75	60/65	40/45