If you’re looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Zhanjiang: The hottest months are usually June and July, with an average temperature of 29°C, while the coldest months are January and December, with an average of 20°C. The rainiest months in Zhanjiang are August, July, June and September, with each month seeing an average of 246 mm of rainfall.