Weather is probably a major factor when you plan your trip to Pu'er, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 22°C, while the coldest months are January and December, with an average of 15°C. The rainiest months in Pu'er are August, July, June and September, with each month seeing an average of 344 mm of rainfall.