Sikkim in January is the coldest, snowiest, and most polarising month of the year for travellers. Gangtok daytime sits at 4 to 10°C with overnight lows often below zero at any altitude above 2,500 metres. Nathang Valley and Aritar see their deepest snow of the year. Tsomgo Lake freezes hard enough to walk on by the second week. Gurudongmar Lake is officially closed for the first two weeks of January because the road past Thangu becomes a sheet of ice. North Sikkim trips beyond Lachung are scrubbed about half the time. For snow chasers heading to Nathang or Aritar this is the month. For anyone whose only Sikkim trip is this one — too much is shut to recommend it.
January weather across Sikkim
Gangtok (1,650 m): daytime highs 4-10°C, overnight lows 1-4°C, occasional frost on cars in the morning. Pelling (2,150 m): 2°C cooler than Gangtok across the board, overnight near-zero possible. Lachung and Lachen (2,750 m): daytime 0-6°C, overnight -4 to 0°C, frozen pipes a regular issue at lower-tier guesthouses. Nathang (4,100 m on the Old Silk Route): daytime -2 to 4°C, overnight -10 to -6°C, deep snow most of the month. Gurudongmar (5,430 m, closed for visits): the lake is frozen, surrounding pasture under a foot of snow.
For snow chasers — Nathang and Aritar
If your reason for January in Sikkim is snow, the Old Silk Route to Nathang Valley is the answer. Nathang at 4,100 metres regularly sees 30 to 60 cm of fresh snow in January, with the surrounding ridges and the access road from Tukla Pass under deep cover. Aritar (Lampokhri Lake) at 1,500 metres sees occasional snowfall in late December and early January — the lake freezes lightly. Tsomgo Lake from Gangtok freezes solid by the second week and locals walk across it. Zuluk also sees regular snowfall. The full Old Silk Route circuit in January is operational with caveats: the road past Tukla can close for days at a time during heavy snowfall, and the Thambi View Point pre-dawn departure becomes a slow exercise on icy roads.
What is open in January
- Gangtok — fully open, dry, clear, the best Tashi Viewpoint Kanchenjunga views of the year (75-80% clear-dawn probability)
- Pelling — open, clear, cold; Kanchenjunga views excellent
- Ravangla, Namchi, Yuksom — open, gentler altitude, comfortable for winter trips
- Tsomgo Lake — open, frozen, dramatic; permit required
- Old Silk Route — operational but weather-dependent past Tukla
- Lachung — open for Yumthang Valley (Zero Point sometimes closed by snow)
- Lachen — open as a town but Gurudongmar circuit closed for first 14 days minimum
- Darjeeling tea-garden side — open and quiet; Tiger Hill clear-view probability around 70%
What is closed or scaled back
- Gurudongmar Lake — closed for January (first 2 weeks always, sometimes the full month)
- Goecha La trek — fully closed (snow on the route)
- Singalila / Sandakphu trek — possible with snow gear but most operators don't run it
- Yumthang Zero Point — accessible early January but closes for stretches in mid-late January due to snow on the access road
- Nathu La — closed Mondays as always, plus closure on heavy-snow days
January pricing — annual low
January (excluding the last week, which is bookended by New Year traffic) is among the cheapest weeks of the year. Mid-range Gangtok hotels at ₹3,800-5,500 (vs ₹9,500 in May). Premium properties — Mayfair, Glenburn — drop to shoulder rates of ₹14,000-18,000 (vs ₹22,000+ in peak season). Vehicle hire and driver wages are unchanged. A 7N/8D winter Sikkim trip avoiding North Sikkim beyond Lachung runs ₹28,000-38,000 per person — close to the annual low.
What to pack
- Down jacket (700+ fill power) — non-negotiable
- Thermal base layer — top and bottom
- Fleece mid-layer
- Insulated gloves, wool beanie, warm socks (two pairs minimum)
- Sturdy walking shoes with good grip — ice on the high passes
- Hand-warmers (Hothands or equivalent) — useful at Tsomgo and Nathang
- Lip balm — at altitude with dry winter air, essential
- Camera with spare battery — cold drains batteries fast at altitude