Weather on 31 December in Changsha airport and what to wear during transit

What will the weather be like on 31 December in airport? I arrive in the airport from Nanning for the onward flight to Phuket. I have about 4 hours to transit in airport. Is a breathable shirt. micro fleece and a normal summer jacket enough to withstand the chilly weather? Or should i wear four layers to warm my upper body?