If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Yuanlin: The hottest months are usually July and August with an average temp of 83°F, while the coldest months are January and February with an average of 66°F. The rainiest months in Yuanlin are August, June, May, and July, with each month seeing an average of 11 inches of rainfall.