Hey Somya , Yesss, it is feasible till December 2nd week, if the weather doesn't change too drastically ... Moreover they say that October to November is the good time to visit north Sikkim ... You can go through this blog for your further queries :- https://www.google.com/amp/krishnandusarkar.com/all-you-need-know-about-north-sikkim/amp/ Happy and safe Travelling !!!