Planning for the weather is a good way to make your trip to Xiaolan relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 29°C, while the coldest months are January and December, with an average of 18°C. The rainiest months in Xiaolan are June, May, August and July, with each month seeing an average of 279 mm of rainfall.