In winter vs During winter

[Hunnybunny]

I need your help once again (my Korean student is really quite a challenge for me). I know that there's practically no difference between in winter and during winter. But somehow, it sounds a little off when you say:

"In winter, Koreans like to ski."

instead of

"During winter, Koreans like to ski."

Or am I just imagining that it sounds off?

[Mister Micawber]

.
They both sound fine to me.
.
_________________
Native English teacher at Mister Micawber's

[Hunnybunny]

Thanks, Mr. Micawber! I'll explain it to my student tomorrow.