Gangtok's year in one table
Gangtok sits at about 1,650 m, so its own weather is mild all year: Wikipedia's climate data gives an average maximum of about 22 °C in summer and an average minimum of about 5 °C in winter. What changes most through the year is not the town but the roads and views around it. Snow decides whether Tsomgo and Nathu La are open, the monsoon decides whether NH10 is open and whether you see any mountains, and school holidays decide what you pay for a room.
Use the table as a starting point. The temperatures are rough day and night figures for Gangtok town; Tsomgo Lake at 3,753 m is 12–15 °C colder. Rain is the monthly pattern rather than a forecast, and festival dates follow the lunar calendar, so they move every year.
One more thing to plan around is daylight. In December and January the sun sets in Gangtok around 4:45–5:00 pm, so long drives should start early; by June it sets around 6:30 pm. Mountain views are a morning affair in every season.
| Month | Gangtok day / night | What to expect | Our rating |
|---|---|---|---|
| January | ≈ 12 / 4 °C | Clear and cold, Tsomgo frozen, snow closures | Good |
| February | ≈ 14 / 5 °C | Snow likely up high, Losar | Good |
| March | ≈ 18 / 8 °C | Warming, haze begins, rhododendrons start | Best |
| April | ≈ 21 / 11 °C | Rhododendrons, pleasant days | Best |
| May | ≈ 22 / 13 °C | Warm, busy school holidays, pre-monsoon showers | Best |
| June | ≈ 22 / 15 °C | Monsoon arrives, landslide risk | Avoid for first trips |
| July | ≈ 22 / 16 °C | Wettest month, about 650 mm of rain | Avoid for first trips |
| August | ≈ 22 / 16 °C | Heavy rain, Pang Lhabsol | Avoid for first trips |
| September | ≈ 22 / 15 °C | Rain easing, green, cheap | Good late in month |
| October | ≈ 20 / 12 °C | Clear skies, Durga Puja crowds | Best |
| November | ≈ 17 / 8 °C | Clearest views, cool nights | Best |
| December | ≈ 14 / 5 °C | Cold, clear, Losoong, Christmas crowds | Good |
October to December: the clear season
When the monsoon leaves in late September, it washes the air clean, and October and November are the months when Kanchenjunga stands out from Tashi View Point and Ganesh Tok most mornings. Days in Gangtok are about 17–20 °C, nights 8–12 °C, and Tsomgo Lake is usually a calm blue. This is our first pick for photographers and first-time visitors.
The catch is crowds. Durga Puja and Diwali fall in October or early November, and travellers from Kolkata and the rest of Bengal fill Gangtok's hotels; rates near MG Marg run 20–40 percent above base and rooms sell out 6–8 weeks ahead. By late November the crowds thin while the views hold. December is colder, with nights near 5 °C and the first snow at Tsomgo and Nathu La, and it fills again over Christmas and New Year. Losoong, the Sikkimese new year, falls in December and is marked with Chaam masked dances at the Tsuklakhang royal chapel; the date follows the Tibetan calendar, so check the year's date.
January and February: snow and quiet
These are the coldest months, with Gangtok days around 12–14 °C and nights near 4 °C. Most rooms need a heater. The reward is crisp, clear mornings, lower prices outside the New Year week and snow on the road to Tsomgo, which is often frozen. Many families travel in this season just to see snow, and the best chance is at Tsomgo and, for Indians, Nathu La.
The risk is closures. After heavy snowfall the Army closes Nathu La, and sometimes the road to Tsomgo, until it is cleared; it can be a day or several. Build in a spare day. The Chaam at Enchey Monastery falls on the 18th and 19th days of the 12th Tibetan month, which usually lands in January or February. Losar, the Tibetan new year, comes in February or early March. Check current road status and festival dates before you travel.
We turn this into a priced, day-by-day plan for your dates.
March to May: flowers and long days
Spring is Gangtok's most comfortable season. Days warm to 18–22 °C, and from about late March the rhododendrons flower in the forests on the way to Tsomgo, while the town's flower shows and nurseries are at their best. Tsomgo thaws through April and May. Kanchenjunga views are less reliable than in autumn because of haze, but early mornings are often clear.
May is the busiest month of the year for families, because school holidays begin across India. Book hotels and North Sikkim trips early. Pre-monsoon storms bring afternoon showers from late April, so plan sightseeing for the mornings. Saga Dawa, which marks the Buddha's birth, enlightenment and death, falls in May or June.
June to September: the monsoon
Sikkim gets heavy rain from the south-west monsoon, and July is Gangtok's wettest month, with about 650 mm on average. Cloud sits on the ridges for days, Kanchenjunga is rarely visible and the roads take damage. NH10 between Siliguri and Gangtok closes after landslides most years, sometimes for days; the alternative road via Kalimpong and Lava or Algarah adds two to four hours. Roads to North Sikkim are often disrupted. Check current road status before you travel.
Some travellers like the monsoon: hotels discount by 30–40 percent, waterfalls are full, the forests are green and the town is quiet. If you go, keep plans flexible, carry rain gear and leech socks for walks, and avoid tight connections at Bagdogra. Pang Lhabsol, the festival that honours Kanchenjunga as Sikkim's guardian deity, falls in August or September with Chaam dances at Tsuklakhang. By late September the rain eases and prices are still low.
What to pack, season by season
Gangtok's own weather is forgiving, but almost every trip includes a day at 3,700–4,300 m, and that is where people get caught out. The rule of thumb we give guests is to pack for Gangtok, then add one warm layer for every 1,000 m you plan to climb above it.
From October to February, bring a down or heavy fleece jacket, thermal inner wear, a woollen cap, gloves and warm socks. Many budget rooms are unheated or charge for a heater, so a light sleeping layer helps. Snow boots for Tsomgo can be rented at the stalls on the way up for about ₹100–200 in winter. In March to May, a fleece and a light rain jacket cover Gangtok, but keep the down jacket for Tsomgo, where mornings are near freezing until May.
In the monsoon, bring a proper rain jacket rather than an umbrella, quick-dry trousers, shoes with grip for wet stone steps and leech socks if you plan forest walks such as the trails around Fambong Lho. Keep a dry bag for phones and documents. In every season pack sunglasses, sunscreen and a refillable water bottle: UV is strong at altitude, and packaged water bottles are restricted in parts of Sikkim at times.
- October–February: down jacket, thermals, cap, gloves
- March–May: fleece, light rain jacket, down jacket for Tsomgo
- June–September: rain jacket, quick-dry clothes, leech socks, dry bag
- All year: sunglasses, sunscreen, refillable bottle, passport photos for permits
Our pick for each kind of trip
No single month suits everyone. These are the months we suggest when guests ask, assuming a Gangtok trip with Tsomgo and perhaps Lachung or Pelling.
- First visit, clear views: mid-October to November
- Snow at Tsomgo and Nathu La: January to March, with a spare day
- Flowers and mild weather: late March to April
- Honeymoon: November, March or April, avoiding Durga Puja and May holidays
- Families with school holidays: May, booked 8 weeks ahead, or late December
- Lowest prices: July to mid-September, if you can be flexible
- Festivals: December for Losoong, August or September for Pang Lhabsol
- North Sikkim with Yumthang flowers: late April to May; with snow at Zero Point: March or October to November
Rules, fees, fares and road status change often. Check current status before you travel.
