If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Xiulin: The hottest months are usually July and August with an average temp of 80°F, while the coldest months are January and February with an average of 64°F. The rainiest months in Xiulin are May, June, February, and January, with each month seeing an average of 30 inches of rainfall.