If you ask about the best time for trekking in Nepal, you will usually get the same answer: October and November or March to May. June, July and August are monsoon season, which means rain, muddy trails, leeches, landslides and plenty of clouds. For large parts of Nepal, that advice makes perfect sense. But it does not apply to the entire country.
Why trekking in Nepal during monsoon can still work
- How does the rain shadow in Nepal work?
- The best rain-shadow routes for trekking in Nepal during monsoon
- Which trekking routes should you avoid during monsoon?
- What is trekking in Nepal during monsoon really like?
- Rain, mud and leeches are still possible
- Why trek Nepal during monsoon at all?
- Is trekking in Nepal during monsoon worth it?
Some regions north of the main Himalayan range lie in a rain shadow. While places such as Pokhara receive heavy rainfall during summer, areas like Upper Mustang, Dolpo and Nar Phu remain much drier. That makes trekking in Nepal during monsoon possible if you choose your route carefully.
This can be especially useful if you are traveling around Asia for several months. The rainy season in much of Southeast Asia overlaps with the Nepal monsoon season, so July and August might actually fit perfectly into your itinerary. And there is another advantage: far fewer people are trekking at this time of year.
How does the rain shadow in Nepal work?
Nepal’s monsoon usually arrives around June and lasts into September. Moist air travels north from the Bay of Bengal and eventually reaches the Himalayas. The mountains act as a huge barrier. As the clouds rise along the southern side of the range, the air cools and releases much of its moisture. This is why areas south of Annapurna and Dhaulagiri can receive enormous amounts of rain during summer. Once the air crosses the highest mountains, there is much less moisture left.
The difference becomes obvious when you look at the landscape. South of the mountains you will find green forests, rice terraces and lush valleys. Farther north, the scenery changes dramatically. Around Mustang and parts of Dolpo, the landscape is dry, rocky and much closer to the Tibetan Plateau.
You can even experience this transition along parts of the Annapurna Circuit trek. The lower sections can be wet and green during monsoon, while the landscape becomes noticeably drier as you move farther north toward Manang and Mustang. This geography creates several interesting options for monsoon trekking in Nepal.
The best rain-shadow routes for trekking in Nepal during monsoon
Four regions are particularly interesting if you want to trek in Nepal in July or August: Upper Mustang, Nar Phu, Dolpo and the upper part of the Annapurna Circuit around Manang. None of them guarantees perfect weather. You can still get rain and cloudy days. However, they generally receive much less rainfall than the classic trekking regions farther south.
Upper Mustang
Upper Mustang is probably the best-known option for trekking in Nepal during monsoon. Once you travel north beyond Kagbeni, the scenery changes completely. Instead of green hills and forests, you will find dry valleys, colorful rock formations, cave complexes and villages surrounded by fields.
One of the highlights is Lo Manthang, the historic walled settlement in the north of Mustang. Along the way, you can also visit monasteries and traditional villages such as Ghami and Tsarang. Upper Mustang is a restricted area, so you cannot simply arrive and start trekking independently. A special trekking permit is required and the trip must be organized according to Nepal’s current restricted-area regulations. Permit rules and prices can change, so check the latest information from Nepal’s Department of Immigration before planning your budget.
The additional costs make Upper Mustang considerably more expensive than many standard teahouse treks. On the other hand, the permit system and remote location also mean that visitor numbers remain relatively low. Summer is an interesting time to experience life in the region as well. Depending on the year and exact dates, local festivals and traditional horse-racing events can take place in Mustang during the warmer months.
Nar Phu Valley
Nar Phu is another interesting option if you are looking for rain shadow treks in Nepal. The valley branches off from the upper Marsyangdi Valley near Koto and leads toward the remote villages of Nar and Phu. The landscape becomes increasingly dry as you move north, with rocky cliffs, narrow valleys and traditional settlements that feel very different from the busier Annapurna Circuit.
Nar Phu is also a restricted area and requires additional permits and an organized trek. There is one important thing to keep in mind during monsoon: getting there. The lower Marsyangdi Valley does not sit completely inside the rain shadow. You may therefore encounter rain, muddy trails and difficult road conditions before reaching the drier sections farther north. Once inside Nar Phu Valley, conditions can be considerably better.
Another advantage is that Nar Phu can be combined with parts of the Annapurna Circuit. This makes it an interesting option if you have enough time and want a longer trek rather than simply walking into Nar Phu and returning the same way.
Dolpo
If Upper Mustang feels remote, Dolpo takes things another step further. Located in western Nepal, this is one of the country’s most isolated trekking regions. Highlights include Shey Phoksundo Lake, remote mountain villages and landscapes that feel far removed from Nepal’s popular trekking routes.
Dolpo also lies largely in the rain shadow of the Himalayas. Summer can therefore be one of the better times to visit. The downside is the logistics. Treks in Dolpo are usually longer and more complicated than routes in the Annapurna region.
Some itineraries require camping equipment and additional support, while getting to and from the region can involve domestic flights. Flights to mountain airports such as Juphal are highly dependent on weather conditions. During monsoon, delays and cancellations can become part of the trip. Dolpo is therefore better suited to experienced trekkers with enough time and a flexible schedule.
Manang and the upper Annapurna Circuit
If you do not want to organize a full expedition into Upper Mustang or Dolpo, the upper Annapurna Circuit can be a more practical alternative. Manang lies north of the Annapurna massif and receives considerably less monsoon rain than the southern side of the mountains.
The lower sections of the route are a different story. In July and August, valleys farther south can be humid, muddy and full of leeches. The landscape gradually changes as you move higher and farther north. Around Manang, the vegetation becomes much sparser and the scenery starts to look increasingly like a high-altitude desert.
Road development along the Annapurna Circuit is often criticized because it has changed the traditional trekking experience. During monsoon, however, those roads can also be useful. Depending on current road conditions, it may be possible to travel farther into the valley by jeep and skip some of the wetter lower sections. From Manang you can continue toward Thorong La and eventually descend toward Muktinath and Mustang, although conditions at high altitude always need to be checked locally.
Which trekking routes should you avoid during monsoon?
The existence of Nepal’s rain shadow does not mean that every Himalayan trekking route suddenly becomes a good idea in July or August. Some popular regions are still difficult during peak monsoon.
Manaslu Circuit
Manaslu can look promising on a map because the northern part of the route around Samagaun and Samdo is relatively close to Tibet and receives less rain than areas farther south.
The problem is getting there. Much of the approach follows the Budhi Gandaki Valley, where heavy monsoon rain can trigger landslides and make trails considerably more difficult. That is why the Manaslu Circuit trek Nepal is generally better suited to the main trekking seasons in spring and fall. You might eventually reach drier terrain in the upper valley, but you first have to travel through the wetter sections below.
Everest region
The Everest region is easier to rule out. Unlike Upper Mustang or Dolpo, the Khumbu does not sit behind the main Himalayan rain shadow in the same way. Summer brings clouds and regular rainfall, especially at lower elevations.
There is another problem: flights. Most trekkers reach the region via Lukla, and poor visibility can cause delays and cancellations. This is inconvenient at any time of year, but the risk increases during the monsoon months. If Everest Base Camp is one of your main goals in Nepal, we would rather plan it for spring or fall.
What is trekking in Nepal during monsoon really like?
Choosing a rain-shadow region solves only part of the problem. The trekking area itself might be relatively dry, but you still have to get there. Roads between places such as Beni and Jomsom or Besisahar and the upper Marsyangdi Valley can be affected by landslides. A journey that normally takes a few hours can suddenly take much longer.
Domestic flights can also be delayed or canceled because of poor visibility. For that reason, flexibility is probably the most important thing you can bring on a monsoon trek. We would recommend leaving at least a few buffer days between returning from your trek and your international flight. Especially with remote routes such as Dolpo or Upper Mustang, planning everything too tightly can quickly become stressful.
Rain, mud and leeches are still possible
The rain shadow starts north of the main Himalayan ranges. Your journey there may still take you through wetter areas. In lower valleys, expect humidity, mud and leeches. Waterproof hiking shoes, quick-drying clothing and a good rain jacket are therefore still important even if your main trekking route is relatively dry. You should also not expect endless blue skies.
Rain-shadow regions receive much less rainfall, but clouds can still move across the mountains and obscure the views. Conditions often vary considerably throughout the day. Starting early can be worthwhile. Mornings are frequently more stable before clouds build later in the day.
Why trek Nepal during monsoon at all?
With all these disadvantages, you might wonder why you should bother. The biggest reason is simple: there are far fewer trekkers. Routes that can be busy during October and November feel completely different in summer. Villages are quieter, trails have less traffic and accommodation is generally easier to find.
The lower valleys are also at their greenest. Rice fields, forests and waterfalls look very different from the dry landscapes you might see later in the year. And once you reach the rain shadow, you get one of the most interesting contrasts in Nepal. Within a relatively short distance, the landscape can change from lush monsoon vegetation to the dry mountains and valleys of the trans-Himalayan region.
That alone can make trekking in Nepal during monsoon a very different experience from visiting during the traditional high season.
Is trekking in Nepal during monsoon worth it?
Yes, but only if you choose the right region. For most classic trekking routes, July and August are still far from ideal. Heavy rain, landslides, muddy trails and limited mountain views can make routes such as Everest Base Camp or the lower sections of Manaslu unnecessarily difficult.
Upper Mustang, Nar Phu, Dolpo and parts of the upper Annapurna Circuit are different. Because they lie partly or largely in the Himalayan rain shadow, they receive significantly less rainfall. Upper Mustang is probably the most straightforward choice if you want a proper rain-shadow trek. Nar Phu is a good alternative if you want to combine remote valleys with the Annapurna region. Dolpo is the option for experienced trekkers looking for something much more remote.
Whichever route you choose, keep your itinerary flexible. Road closures and flight delays can still happen even if the trekking area itself remains dry. So the usual advice that you should avoid Nepal completely between June and September is a little too simple. For the right route, monsoon trekking in Nepal can actually be one of the quieter and most interesting ways to experience the Himalayas.
Have you ever done trekking in Nepal during monsoon? What were your experiences? Please share them with us in the comment section.
