January is called as winter in Sikkim where days are pleasant whole nights are cold. Inspite of cold weather, you get to see breathtaking views so January is an ideal time to visit Sikkim provided you carry enough winter wears to keep yourself warm. Places to visit in Gangtok- Rumtek monastery, Kanchenjunga moonlight view, Himalayan zoo, seven sisters waterfall, Sarala’s garden and you could trek to Nathula based on that day snow besides doing a yak safari. Pelling- Sangachoeling monastery, swearo rock garden, rimbi falls, Yuksom, Ravangla and geyzing. Darjeeling- Nightingale park, singalila park, Japanese pagoda, tea plantations, zoo park and museum. Lepchajagat is a lovely spot 7km away from Darjeeling.
Jan is the best time for Sikkim Tour. U might get snow while traveling .. Gangtok is the town but I will suggest u to stay in a village ,homestay to enjoy the peace & scenic beauty of Sikkim... Try to stay at Lamahata at tent 1 day instead of Darjeeling. There are many other beautiful places .. In Darjeeling visit Mahakal Madir & Burdwan Palace, also cover near by places like Mirik,Kalimpong , Kurseong by car as Sightseeing.. Pelling - Sky walk at Glass bridge, Temi's tea Garden ( U can also stay there.) ,Singshore Hanging bridge ..
Its difficult to complete North Bengal & Sikkim in 1-2 Trip.. Vast place & Magnificent Kanchenjunga has various appearance from different region. Do try THAKALI & local Momo's at Gangtok .
If you love snow, then you will love visiting Sikkim in January. Places to visit in Gangtok:
Nathula Pass, MG Pass, Baba Harbhajan Singh Memorial Temple, Banjhakri Waterfalls, Hanuman Tok, Himalayan Zoological Park, Ranka Monastery, Tashi View Point, Mt. Katao, Gangtok Ropeway, Ganesh Tok View Point Places to visit in Pelling:
Pemayangtse Monastery, Rabdentse Ruins, Pelling (Park & Garden), Sanghak Choeling Monastery, Khecheopalri Lake, Sky Walk Pelling, Kanchenjunga Falls, Rimbi Waterfalls , Rimbi Orange Garden, Kathok Lake, Glacier Lake & Adventure Places to visit in Darjeeling:
Batasia Loop, Yoga Choeling Monastery, Himalayan Mountaineering Institute, Zoological Park, Peace Pagoda, Happy Valley Tea Estate, Darjeeling Rangeet Valley Passenger Ropeway, Chowrasta, Observatory Hill View Point, Mall Road, Tibetan Refugees Self-help Centre, Tiger Hill, Tenzing Rock , Rock Garden Happy journey 🙌