Hey, it won't be cold there, wear long sleeves and jacket would be okay. You should go to Baiyun Mountain, Shamian Island and, don't miss the markets in Guangzhou! That's the best place for shopping. You can check Guangzhou Tours(https://www.travelchinaguide.com/package/guangzhou.htm) , there are itineraries and destinations suggested.

Hi,
it will be little cold,bringing warm jacket with you is better,
for the traveling, Chimelong amusement park,White cloud mountain,
Yuexiu park,and some area near to sports square,times square....
night time-Beijing road night market,Shangxia jiulu night market, pearl rever night scenery and ferry...........