When you’re planning your getaway to Dianshantou, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually August and July with an average temp of 79°F, while the coldest months are January and February with an average of 51°F. The rainiest months in Dianshantou are June, August, May, and July, with each month seeing an average of 10 inches of rainfall.