Weather is probably a major factor when you plan your trip to Xinkai, 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 78°F, while the coldest months are January and February with an average of 44°F. The rainiest months in Xinkai are July, June, August, and September, with each month seeing an average of 8 inches of rainfall.