If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Pu’er: The hottest months are usually April and May with an average temp of 71°F, while the coldest months are January and December with an average of 59°F. The rainiest months in Pu’er are August, July, June, and September, with each month seeing an average of 14 inches of rainfall.