A-Train, It's a little difficult to understand where it's cold here. Looking at the seasonal temperatures means very little and moving south (unless it's far south) doesn't mean much either.
Where I live the temperature never drops much below 0C and there is no snow but it's cold. It feels really cold because there is very little heating and no central heating. If you get cold you can't get warm again. No stores, schools, homes, offices any buildings outside of good hotels are warm. After being out, when I come home I must put on more clothes to lounge around the house keeping a heavy coat on. The buildings here are concrete and just whisk heat away. Summer temps run over 40C so the buildings are built with summer in mind.
If you are worried about feeling cold, look at the far south like Guangdong or north of the Yangzi river where as Lotus said they have indoor heating. It's a little like wind chill. It doesn't really matter what the temperatures are, it's how cold do you feel.