Quick Overview : Langtang valley trek weather and temperature guide
- Best Months:Â October, November (Post-Monsoon), April, May (Pre-Monsoon)
- Good Months:Â March, September (Shoulder Seasons)
- Challenging Months: December – February (Winter), June – August (Monsoon)
January: Deep Winter
- Weather:Â Cold, dry, and stable. Expect crystal-clear blue skies but very cold temperatures, especially at night. Significant snowfall is common at higher elevations (above Kyanjin Gompa).
- Temperatures:
- Syabrubesi (1,500m): 10°C / 50°F (Day) | -2°C / 28°F (Night)
- Kyanjin Gompa (3,870m): 3°C / 37°F (Day) | -12°C / 10°F (Night)
- Trekking Conditions:Â Challenging. For experienced trekkers with serious cold-weather gear. Very few crowds.
February: Late Winter
- Weather:Â Similar to January but with slightly longer, slightly warmer days. Still very cold at night. A good chance of clear skies and snow on the trails.
- Temperatures:
- Syabrubesi (1,500m): 12°C / 54°F (Day) | 0°C / 32°F (Night)
- Kyanjin Gompa (3,870m): 5°C / 41°F (Day) | -10°C / 14°F (Night)
- Trekking Conditions:Â Less extreme than January but still a winter trek. Good for solitude and clear skies.
March: Spring Begins
- Weather:Â A fantastic transition month. Days become pleasantly warm, and sunshine is abundant. Nights remain cold. Rhododendron forests begin to bloom.
- Temperatures:
- Syabrubesi (1,500m): 16°C / 61°F (Day) | 5°C / 41°F (Night)
- Kyanjin Gompa (3,870m): 8°C / 46°F (Day) | -5°C / 23°F (Night)
- Trekking Conditions:Â Excellent. Stable weather, comfortable hiking temperatures, and beautiful scenery. Crowds start to increase.
April: Prime Spring Season
- Weather:Â Arguably the best weather of the year. Days are warm and sunny with stunningly clear mountain views. Nights are cold but not severe.
- Temperatures:
- Syabrubesi (1,500m): 18°C / 64°F (Day) | 7°C / 45°F (Night)
- Kyanjin Gompa (3,870m): 10°C / 50°F (Day) | -2°C / 28°F (Night)
- Trekking Conditions:Â Ideal. This is peak season. The trails are busy, and teahouses are full. Book in advance.
May: Pre-Monsoon Heat
- Weather:Â Days are warm to hot in the lower valleys. Skies are often hazy. Late in the month, the first pre-monsoon showers may arrive, bringing humidity.
- Temperatures:
- Syabrubesi (1,500m): 20°C / 68°F (Day) | 10°C / 50°F (Night)
- Kyanjin Gompa (3,870m): 12°C / 54°F (Day) | 1°C / 34°F (Night)
- Trekking Conditions:Â Very good, especially in the first half. Lush and green. Be prepared for potential rain and leeches.
June: Monsoon Begins
- Weather:Â The monsoon arrives. Expect frequent rainfall, high humidity, cloudy skies, and leeches. Landslides can occasionally block trails.
- Temperatures:
- Syabrubesi (1,500m): 21°C / 70°F (Day) | 13°C / 55°F (Night)
- Kyanjin Gompa (3,870m): 13°C / 55°F (Day) | 4°C / 39°F (Night)
- Trekking Conditions:Â Challenging. Trekking is wet and muddy. Mountain views are often obscured. Not recommended.
July: Peak Monsoon
- Weather:Â The height of the monsoon. Consistent and heavy rainfall, saturated landscapes, clouds, and fog. The risk of landslides is high.
- Temperatures:
- Syabrubesi (1,500m): 22°C / 72°F (Day) | 15°C / 59°F (Night)
- Kyanjin Gompa (3,870m): 14°C / 57°F (Day) | 6°C / 43°F (Night)
- Trekking Conditions:Â The most difficult time to trek. Very few trekkers. Generally not advised.
August: Peak Monsoon
- Weather:Â Very similar to July. The monsoon continues with persistent rain, high humidity, and overcast skies. Trails are muddy and leech-infested. Landslide risk remains.
- Temperatures:
- Syabrubesi (1,500m): 22°C / 72°F (Day) | 15°C / 59°F (Night)
- Kyanjin Gompa (3,870m): 14°C / 57°F (Day) | 6°C / 43°F (Night)
- Trekking Conditions:Â Extremely challenging and not recommended for most trekkers. Views are almost entirely blocked by cloud cover. Teahouses are open but very quiet.
September: Monsoon Tail-End
- Weather:Â The monsoon begins to withdraw. Rainfall decreases, but showers are still likely. Skies start to clear more frequently. It remains humid.
- Temperatures:
- Syabrubesi (1,500m): 20°C / 68°F (Day) | 12°C / 54°F (Night)
- Kyanjin Gompa (3,870m): 13°C / 55°F (Day) | 4°C / 39°F (Night)
- Trekking Conditions: A transitional month. Can be a gamble—you might get lucky with clear weather or experience residual rain.
October: Prime Autumn Season
- Weather:Â The best trekking weather. Crystal-clear skies, excellent visibility, stable conditions, and warm days. Nights are cold and crisp.
- Temperatures:
- Syabrubesi (1,500m): 18°C / 64°F (Day) | 7°C / 45°F (Night)
- Kyanjin Gompa (3,870m): 11°C / 52°F (Day) | -3°C / 27°F (Night)
- Trekking Conditions:Â Ideal. The most popular month. Expect busy trails and full teahouses. Booking in advance is essential.
November: Post-Monsoon Excellence
- Weather:Â Similar to October, but noticeably colder, especially at night. Days are still sunny and clear with unparalleled mountain views.
- Temperatures:
- Syabrubesi (1,500m): 15°C / 59°F (Day) | 3°C / 37°F (Night)
- Kyanjin Gompa (3,870m): 8°C / 46°F (Day) | -7°C / 19°F (Night)
- Trekking Conditions:Â Excellent. A fantastic time to trek. Crowds begin to thin out. Requires warm gear for the cold nights.
December: Early Winter
- Weather:Â Winter sets in. Days are sunny but short and cold. Nights are freezing. Snow begins to fall at higher elevations.
- Temperatures:
- Syabrubesi (1,500m): 12°C / 54°F (Day) | 0°C / 32°F (Night)
- Kyanjin Gompa (3,870m): 5°C / 41°F (Day) | -10°C / 14°F (Night)
- Trekking Conditions:Â Good for experienced trekkers. The skies are clear, and the crowds are gone. Requires preparation for cold and potential snow.
Langtang Valley Trek Average Temperature and Altitude chart
FAQs: Langtang Valley Trek Weather & Seasons
When is the absolute best time to trek the Langtang Valley?
The two best windows are:
Autumn (October – November): Offers the clearest skies, stable weather, and excellent mountain views. This is the most popular time.
Spring (April – May): Features warm days, blooming rhododendron forests, and clear skies, though there can be more haze than in autumn.
Can I trek during the monsoon (June to August)?
It is possible but not recommended for most trekkers. Challenges include:
Heavy rainfall and muddy, slippery trails.
Leeches in the forested sections.
Clouds and fog that consistently obscure the mountain views you’re there to see.
A higher risk of landslides and flight delays into Kathmandu. Only attempt this if you are prepared for constant wet conditions and don’t mind missing the spectacular scenery.
Is trekking in the winter (December – February) a good idea?
It can be a great idea for experienced trekkers who are well-prepared. Advantages include crystal-clear skies and no crowds. The major challenge is the extreme cold, especially at night in Kyanjin Gompa, and trails that can be icy or blocked by snow at higher elevations. You must have a four-season sleeping bag and serious cold-weather gear.
What is the biggest weather-related risk on this trek?
This depends on the season:
Spring/Autumn:Â The main risk is a sudden, brief snowstorm at high altitude, especially outside the core season (e.g., late November or March).
Monsoon:Â The primary risks are landslides on the trail and road to Syabrubesi, and slippery, muddy paths.
Winter:Â The risks are exposure to extreme cold, frostbite, and trails made dangerous by ice and snow.
How accurate are these temperature ranges?
They are averages based on historical data. Mountain weather is highly unpredictable. It is common to experience a wide range of conditions in a single day (e.g., warm sun, cold wind, and brief snowfall). Always be prepared for conditions that are colder and wetter than forecast.
What is the temperature difference between the start and the end of the trek?
Significant. The trek starts at Syabrubesi (approx. 1,500m) and ascends to Kyanjin Gompa (3,870m) and Kyanjin Ri (4,773m). For every 1,000 meters gained in altitude, the temperature can drop by 6-7°C (about 11°F). It’s crucial to pack layers for all conditions.
Do I need to book teahouses in advance?
Yes, during the peak seasons (April-May, October-November). Teahouses can fill up quickly with large groups. In the off-seasons (monsoon, winter), you can usually book as you go due to very few trekkers.
What is the single most important piece of gear for this trek?
Beyond good boots, it’s reliable layers. A moisture-wicking base layer, insulating mid-layer (fleece/down), and a waterproof/windproof outer shell are essential for managing the rapidly changing mountain conditions. In winter, a high-quality, cold-weather sleeping bag (~ -20°C / 0°F rating) is non-negotiable.
Will weather affect my flight into Kathmandu to start the trek?
Potentially, yes. During the monsoon (June-Sept) and occasionally in winter due to fog, flights into Tribhuvan International Airport (KTM) can be delayed or diverted. It’s highly advised to arrive in Kathmandu at least 1-2 days before your trek start date to account for any travel disruptions.
I get cold easily. Which month should I choose?
Aim for the shoulder seasons at the warmer end: Late April, May, or late September, October. These months offer a good balance of manageable nighttime temperatures (usually above freezing in Kyanjin Gompa) and relatively stable weather. Avoid December through February.
