If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Xinyu: The hottest months are usually August and July, with an average temperature of 27°C, while the coldest months are January and December, with an average of 10°C. The rainiest months in Xinyu are June, May, April and March, with each month seeing an average of 303 mm of rainfall.