Weather will likely play an important role when you plan your trip to Xinyu, but bear in mind that cheaper options are usually available when the weather isn't as good. 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.