It snows a lot these days. You'd better avoid snow days to go the wall. But if it snows and you cannot change your plan, I suggest you to visit the repaired sections such as Badaling, Juyongguan and Mutianyu for safety concerns and easy transportation. DO NOT go to the wild sections such as Jinshanling, Simatai and Jiankou. They can be extremely dangerous！

By the way, everything is accessible in winter in Beijing as in the other seasons. You should wear warm because it is cold and windy on the Great Wall.