If you are a foreigner, there are some restrictions for you. You should apply for the Tibet Travel Permit so that you can enter Tibet. The weather in October is cool, dry and sunny, so this month is quite suitable for Tibet travel. However, if you want to travel to Tibet in October, try to avoid Oct.1st to 7th. Because it is the Chinese National Day, and many Chinese would rush into Tibet during these seven days. In October, leaves and grasslands in Tibet turn from green to yellow, just like a fairy tale world. Meanwhile, the temperature difference between day and night is large in October. At daytime, it is around 12℃, and it drops to 2℃ at night. Thus taking some warm clothes is necessary.