When you’re dreaming of a getaway to Chengbu County, year-round temperatures and rainfall may be important factors to consider. The hottest months are usually August and July with an average temp of 77°F, while the coldest months are January and December with an average of 49°F. The rainiest months in Chengbu County are June, May, April, and July, with each month seeing an average of 12 inches of rainfall.