Weather is probably a major factor when you plan your trip to Nanning, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 28°C, while the coldest months are January and December, with an average of 16°C. The rainiest months in Nanning are June, August, May and July, with each month seeing an average of 259 mm of rainfall.