"Wuhan's winter is very cold" can be translated to "Wuhan de dongtian hen leng" in Chinese.

The phrase "dongtian" (冬天) in Chinese is composed of two characters, "dong" (冬) meaning winter, and "tian" (天) meaning day.

The phrase "hen leng" (很冷) in Chinese is composed of two characters, "hen" (很) meaning very, and "leng" (冷) meaning cold.

Here are some example sentences in Engpsh and their Chinese translations:

"The winter in Wuhan is extremely cold." = "Wuhan de dongtian hen leng."
"I hate how cold Wuhan's winter is." = "Wo bu xihuan Wuhan de dongtian hen leng."
"You should bring warm clothes if you're going to Wuhan in the winter." = "Ni ru guo qu Wuhan dongtian, ying gai dai renyi yifu."