Weather is probably a major factor when you plan your trip to Liangshan Yi, 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 19°C, while the coldest months are January and December, with an average of 8°C. The rainiest months in Liangshan Yi are June, July, August and September, with each month seeing an average of 244 mm of rainfall.