You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, taking a look at local weather data can help you. The hottest months are usually July and August with an average temp of 82°F, while the coldest months are January and December with an average of 61°F. The rainiest months in Nanning are June, August, May, and July, with each month seeing an average of 10 inches of rainfall.