15/16 doesn't really count as that wasn't really a comeback but all of our annual snow from one storm in January. I remember 14/15 being pretty solidly wintry - that was the year Boston got just storm after storm right?
I don't recall many comebacks (at least when I lived there in the 2010s) given what the area has gotten so far. Don S will tell you the probabilities of reaching climo in NYC at this point.
This is the only 80F ever recorded between Nov 19 and Feb 20 (Nov 18 is the latest 80F ever recorded for a calendar year, and Feb 21 used to be the earliest).