I will visit Hong Kong in this December.How is the weather at that time?

The temperature may range from 60 F to 70 F during that period of time. Although there may have several cloudy days, the climate will still be cool and comfortable. You don't need to prepare winter clothes. Just bring jackets, long-sleeved shirts and jeans.
For accommodation, you are advised to stay at Tsim Sha Tsui Area. Fortune-Inn Business Hotel is a nice one. It has clean environment and kind service. The price is around 700 HKD per night. The exact location is 9A, Golden Crown Court 66-70 Nathan Road. Hope you like.