Is it dangerous to fly from Beijing to Shenzhen in this weather?

If the weather is bad, the airport will not take off, so there will be no danger. It's a little colder in Shenzhen these days, about 13 degrees. Wear a thin sweater, coat or cotton-padded jacket.

After you come, you can check the weather in the upper left corner of the home page of 372 1, and you can check any city you want.