Is the temperature difference between 12℃ large?

In dry and sunny weather, the temperature difference of 12℃ is not too big, and there is often a temperature difference of more than 13℃ in coastal Shenzhen and Guangzhou, not to mention mainland cities. Generally, the temperature difference is large in winter and small in summer.

A temperature difference of 4-5 degrees is only possible on cloudy days.

The places with large temperature difference are all in desert areas, including Xinjiang.

Today's temperature difference: Yining, Xinjiang 16 degrees, Wuhan 14 degrees, Beijing 12 degrees, Guangzhou 6 degrees (cloudy) and Shenzhen 5 degrees (cloudy). ...