Let me explain it in details. If you travel to Everest Base Camp in December, the road will be blocked if there is heavy snow. In addition, it will be slippery and dangerous if drive on the road, especially to travel to the Everest Camp. Actually, climbing Mt. Everest is very dangerous, only those who can endure the adverse weather and experienced climbers should venture onto its slopes. The area is frequently beset with sudden storms, snow, wind and the weather may change quickly in a day. Only the periods between early March and late May, along with early September and late October are fit for climbing, among which less than 20 days are actually fine. Additionally, the hotels in Gyangtse , Shigatse, Dingri and the Everest Base Camp are very simple due to the local limited conditions, and the central heating are not available in the hotel, thus it will be chilly, which is not suitable for tour. While it just ok for Lhasa city at that time.

I think I make it clearly and take care.