Weather is probably a major factor when you plan your trip to Zhongshan, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August with an average temp of 84°F, while the coldest months are January and December with an average of 64°F. The rainiest months in Zhongshan are June, August, May, and September, with each month seeing an average of 13 inches of rainfall.