Winter in Sikkim starts from October till march. Thangu, Zero Point, Yumthang Valley, Gurudongmar Lake in North Sikkim are blanked with snow in winters. Gnathang, Old Baba Mandir, Kupup, Memencha Lake, Lachen Village and Chopta valley are some of other place which get snowfall every year in the winter season.
I have visited only South Sikkim in that Changu lake have heavy snowfall. But North Sikkim ki best. Nathu La and Zeropoint in East Sikkim.
Best time to visit- October to March
Sikkim receives snowfall in winter. You can go from November to March anytime. Natula pass, zero point, gurudongmar lake are best places for enjoy snow.
I went to Sikkim in March end and got lucky and even witnessed a snowfall. If u want to see snow the best time would be either October November or Feb end till match end. I had 8 days in hand and I visited Gangtok..natula pass..lachen..lachung..as well as Pelling. I witnessed snowfall at natula pass and tsomgo lake. also a lil snow fall at gurudongmar lake. If u want to explore all of Sikkim..u would need atleast 10 days in hand. however if u want to see bits and pieces of the place 5 days can b okay too.
Try these treks agar ICE dekhni h to:
Goecha La Trek. Varsey Trek. Kanchenjunga Base Camp Trek. Sandakphu Trek. Rhododendron Trek..
Kasturi Orar Round Trek.
Green Lake Trek. Dzongri Trek.