I don't think any trip to New York is ever not worth it! But then again...I adore NYC [I could just never live there, lol].

I went down there last year for my 21st birthday and had a blast. However, I went during August...so I'm afraid I can't help you much.

I wouldn't think it would still be freezing though...my friend lives in Chicago and it normally starts warming up there in March. But, like I said, I don't know for sure...I'm just assuming since Chicago and New York are both up north.