If you were reading a book in your warm bed on a cold winter's day, you might say you were snug as a bug in a rug.

VOA: special.2009.06.28

Let's pretend that a friend of yours visits on a very cold winter day.

让我们假设你的一个朋友在一个天气非常寒冷的冬日拜访你。

How about 课堂 - SpeakingMax英语口语达人

Hundreds of millions braved the cold winter weather to travel home to be with their families, putting a great strain on the country's transport system.

VOA: standard.2010.02.14