Which place is colder in winter, Qingdao, Dalian or Pingyao?

I stayed in Qingdao and Dalian for a long time.

1. It must be the coldest latitude in Dalian, with strong wind, sea breeze and northeast wind. In winter, the temperature is mostly around 0-MINUS 10, and the temperature is secondary. Breaking winds in Dalian often make you twice as cold.

Qingdao is the warmest. Although the wind at the seaside is not small, I feel that it is not so strong inside. In particular, Qingdao is less affected by the cold wave and the northeast wind, because when the cold air flow reaches Qingdao, it is weakened because of the filtration of the ocean and the blocking of the hills. On the contrary, Dalian will not work.

Pingyao is an inland city, the temperature should be similar to Dalian, but its wind is small, so it is not so cold, but the temperature difference between morning and evening is large.