If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Nanzhuang: The hottest months are usually July and August with an average temp of 85°F, while the coldest months are January and December with an average of 64°F. The rainiest months in Nanzhuang are May, June, August, and September, with each month seeing an average of 12 inches of rainfall.