It's the same as: "It's a warm day for a nice refreshment, isn't it?" This kind of grammar is called a "question tag".

Eugene, thank you for your correcting that.

" It's a warm day for a nice refreshment ,no ? " This sentence does not sound like something a fluent speaker would say. I might say these: "It's very hot today, how about something (cold) to drink?" "It's very hot today, so let's have something (cold) to drink." "It's really hot today, I need something (cold) to drink,......don't you?" "I'm hot, aren't you ?" "It's hot today, isn't it ?" "I really want something to drink, don't ?" By the way, I am looking for a Korean language partner, I am a very good teacher,.........don't worry, I am not looking for $$$. I just need some help with Korean study. I can already read, write, and speak Korean somewhat. eadgbe2002(at)yahoo(dot)com

Native English speakers don't use it; it's usually used by people who speak English as a second language.