The average temperature is around 10C at that time. Nanjing is entering winter. It has little snow and usually din't have any snow for a couple of years. If it might be snowing, that should be in Jan or Feb.

Extremely cold
The temperature always changing when its turns to winter.
Today's temperature is around 10c,so cold!But it will be wormer recently.You'd better take the clothes for winter in case.It's moist here and sometimes will have strong wind which will make you feel colder.

Thank you mr Sam...I am looking up the cities I wish to go to...HK....is my first on the list....then I would like to travel by train through the country....