Weather is probably a major factor when you plan your trip to Wuyishan, 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 75°F, while the coldest months are January and December with an average of 47°F. The rainiest months in Wuyishan are June, May, July, and August, with each month seeing an average of 19 inches of rainfall.