Langtang Valley Weather: Month-by-Month Guide

A Shorter Trek with a Wider Window

The Langtang Valley trek has three usable windows: October to November, March to May, and — with more caveats — mid-December to mid-February. Because there is no high pass to cross, winter trekking is much more feasible than on Annapurna Circuit or Manaslu, though snow above Kyanjin does turn side-trips into serious walks.

The trek is a straight in-and-out up the Langtang valley from Syabrubesi (1,550 m), and can be done in as little as 5 to 8 days. Its brevity is why it works better than long circuits in December and February.

Temperatures Along the Trail

Nights at Kyanjin Gompa are noticeably milder than at similar altitudes on EBC or Manaslu — the valley sits south of the main range and captures a bit more air moisture, which insulates the ground overnight.

Month-by-Month Breakdown

January and February — Cold and snowy but doable

Trekkable to Kyanjin Gompa in most winters, with genuine snow above Langtang village. Tserko Ri and Kyanjin Ri side-trips get much harder — often waist-deep snow. Some lodges above Langtang village close for the coldest weeks. Not for first-time trekkers, but the trek is short enough that experienced parties do it regularly.

March — Snow melts, blooms start

Lower valley warms up, rhododendrons begin blooming below Lama Hotel by late March. Higher up still cold, some snow on the trail to Kyanjin. A pleasant month with fewer trekkers than April.

April — Peak spring

The best of the pre-monsoon window. Rhododendrons in full colour through the lower forest, warm days, cold-but-comfortable nights at Kyanjin. Views clear early in the month, hazier by end-April. Lodges are busy but not October-crowded.

May — Warm and hazier

Days warm even at Kyanjin. First half of May still gives good visibility; second half sees pre-monsoon cloud building and afternoon storms.

June to mid-September — Monsoon

Wet, cloudy, and leech-heavy in the lower forest. The trail is technically open, and some trekkers do go for the green forest and empty lodges, but views are unreliable. Landslides on the Trisuli–Syabrubesi road can also strand you on either end for days.

Late September to October — Peak autumn

The single best window. Clear post-monsoon skies, warm days, cold-but-tolerable nights at Kyanjin. Book Lama Hotel and Kyanjin lodges ahead — the trek is popular for its short duration and easy access from Kathmandu.

November — Cold and quiet

Fewer trekkers than October, still excellent visibility, colder nights at Kyanjin. A great month for solitude if you have warm enough gear.

December — Cold, mostly clear

First half of December still trekkable in most years; second half often sees the first heavy snowfall of winter, which can block the trail above Langtang village. Check conditions before travelling.

The 2015 Earthquake and What It Means Today

On 25 April 2015, a massive earthquake triggered a rock-and-ice avalanche off Langtang Lirung that obliterated Langtang village, killing around 250 people including local villagers and foreign trekkers. It was one of the single deadliest mountain disasters in Nepal's recorded history.

Langtang has been rebuilt. The village today sits on a slightly relocated site, lodges are up and running, and the trek is safe and open. Two operational notes:

• The valley walls are still visibly scarred where the avalanche came down. The rebuilt village and lodges are set back from the immediate fall-line and are geologically safer than the pre-2015 site.
• Choosing to trek Langtang is often described by locals as a form of ongoing tourism recovery — the community depends heavily on this trek's traffic. That is not weather advice, but it is why many trekkers deliberately pick Langtang over Annapurna or Everest.