北京的冬夜很冷 英文怎么说

你这句可以，就是把Nights 改成night,或者is 改成 are.单复数统一嘛~
要用the 在前面。

the winter nights are so cold in Beijing.
建议：
it's cold(chilly/freezing) at night in Beijing.

The winter night in Beijing is very cold.

It is so cold in beijing at winter nights

It's rather cold in winter night in Beijing.

The winter in Beijing is very cold.