Typical seasonal exposure along the route, merged from the stops that have a place page. Seasonal patterns only, never conditions today.
Landslideshigh in a typical yearJun-Sep
The Langtang gorge is geologically active and the main trail was rerouted after the 2015 earthquake; monsoon rain loosens the slopes, so slide-prone sections are best crossed without lingering.
Recorded for Langtang Valley, Syabrubesi, Lama Hotel, Langtang village and 2 more. Langtang Valley Trek (Wikivoyage)
Road blockageshigh in a typical yearJun-Sep
Expect the Rasuwa road to be slower in the monsoon: the bus run that takes 8 to 11 hours in dry weather typically takes longer when it rains, and slides can hold vehicles up.
Recorded for Langtang Valley, Syabrubesi, Kathmandu. Langtang Valley Trek (Wikivoyage)
Floodinghigh in a typical yearJun-Sep
Syabrubesi sits on the valley floor at the Bhote Koshi and Langtang Khola confluence, where monsoon flows run high and a landslide dam breaking out upstream can send a flash flood down the river.
Recorded for Langtang Valley, Syabrubesi, Kathmandu. Landslide damming (Nepal) (Wikipedia)
Altitudehigh in a typical yearAll year
General information, not medical advice: this is high ground where altitude illness is a real risk. Gain height slowly, build in an acclimatisation day, learn the symptoms of headache with nausea, breathlessness or unsteady walking, and go down if they get worse. See a doctor before travelling and carry insurance that covers helicopter evacuation. Kyanjin Gompa is the usual acclimatisation stop before the Kyanjin Ri and Tserko Ri day hikes, which reach roughly 4,770 m and 4,980 m.
Recorded for Langtang Valley, Langtang village, Kyanjin Gompa. Altitude sickness (Wikivoyage)
Coldhigh in a typical yearDec-Feb
December to February brings hard frost and deep cold at this height, with short days and lightly heated lodges; a four-season sleeping bag and down layers are normal kit.
Recorded for Langtang Valley, Syabrubesi, Lama Hotel, Langtang village and 2 more. Langtang National Park (Wikivoyage)
Avalanche terrainmoderate in a typical yearDec-Apr
The upper Langtang valley is geologically active and avalanche paths reach the valley floor; the 2015 earthquake-triggered avalanche that destroyed Langtang village is the extreme case, while snow-loaded slopes in winter and early spring are the ordinary seasonal concern.
Recorded for Langtang Valley, Langtang village, Kyanjin Gompa. Langtang Valley Trek (Wikivoyage)
Snowmoderate in a typical yearDec-Mar
Snow covers the upper valley through winter and into March; some upper lodges shut and the high day hikes may not be practical.
Recorded for Langtang Valley, Syabrubesi, Lama Hotel, Langtang village and 1 more. Langtang National Park (Wikivoyage)
Othermoderate in a typical yearJun-Sep, Dec-Apr
From June to August the forest trails are slippery after rain, leeches are common and the mountains are usually hidden by cloud.
Recorded for Lama Hotel, Kathmandu. Langtang National Park (Wikivoyage)