crzyfrank
I stayed in a hostel and feel spring or fall is best. It can get pretty hot in summer and snow in winter.

Exco
China heats up around June, and cools down around September-October. March-April is the quietest time in China to enjoy a holiday, careful not to go in May or the first week of October, as it clashes with two of China's larger holidays. If you want you can go around September or mid October, where the leaves are just turning red, a breath-taking sight in its own.