If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Guanxi: The hottest months are usually July and August, with an average temperature of 26°C, while the coldest months are January and February, with an average of 16°C. The rainiest months in Guanxi are August, July, June and September, with each month seeing an average of 262 mm of rainfall.