Planning for the weather is an important factor for making your trip to Xiushan a success, especially when you’re splurging. The hottest months are usually August and July, with an average temperature of 23°C, while the coldest months are January and December, with an average of 7°C. The rainiest months in Xiushan are June, July, May and April, with each month seeing an average of 269 mm of rainfall.