Weather is probably a major factor when you plan your trip to Ruisui, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 25°C, while the coldest months are January and February, with an average of 17°C. The rainiest months in Ruisui are May, August, June and September, with each month seeing an average of 458 mm of rainfall.