Is it good time to go to Jiuzhaigou in october ? How is the weather ?

Actually, the mid to late October is the golden time to visit Jiuzhaigou. At that time, you can enjoy very beautiful scenery as well as the colorful leaves.
The average temperature then is about 15-18 C and it may rain. So you'd better take along the over-coat and the rainy wear. Besides, due to the speacial location and geography, the weather there is changeable, so to pay attention to the weather forecast in advance is suggested.