Can you trek in Nepal in June 2026?

Yes, with two important conditions. First ten days of June are the tail of the pre-monsoon window — workable on most routes if you accept some afternoon cloud and a 30 to 40 percent chance of rain. From around 10 to 15 June onwards the southwest monsoon usually breaks across the Annapurna and Khumbu regions and most south-facing routes turn into mud, leeches and grounded Lukla flights. The exception is the rain-shadow belt north of the Himalayas — Upper Mustang, Lower and Upper Dolpo, Nar Phu Valley, and parts of the upper Manaslu corridor — which stay dry and walkable through July and August. The Department of Hydrology and Meteorology forecast for 2026 calls for an on-time monsoon onset around 12 June, slightly wetter than the long-term average.

When does monsoon actually start in Nepal in 2026?

The monsoon front usually crosses eastern Nepal by 8 to 12 June and reaches the western districts within five to seven days. The Department of Hydrology and Meteorology's pre-monsoon outlook for 2026 puts onset at around 10 to 14 June with above-normal rainfall expected for the June to September window. Withdrawal typically starts mid-September. Practical planning rule: any trek that summits before 10 June has a fair shot at clear mornings; after 15 June, you are committed to a monsoon-season plan.

Why are Upper Mustang and Dolpo dry in monsoon?

The Annapurna and Dhaulagiri massifs sit between the Bay of Bengal monsoon front and the trans-Himalayan plateau to the north. Monsoon clouds drop their rain on the south-facing slopes — Pokhara averages 800 mm of rain in July alone — and arrive in Mustang, Dolpo and Nar Phu as thin, dry air. Jomsom records around 30 mm in July; Dho Tarap in Upper Dolpo averages under 20 mm. That is why these routes run their main trekking season in June, July and August while every other Nepal trek closes.

Is Annapurna Base Camp doable in early June 2026?

The first week of June is the last realistic window for the 8-day Chhomrong-start ABC trek. Sanctuary mornings often clear, afternoons cloud over, evening rain runs 30 to 60 minutes. Leech pressure starts in the bamboo and rhododendron forest below Bamboo by 5 to 7 June — wear ankle-high gaiters and gaiter spray. From 12 June onwards, the upper sanctuary stays cloud-locked most days and the Modi Khola crossings become harder after heavy rain. We will book ABC departures up to 5 June 2026; after that we steer travellers to Mustang, Nar Phu or a postponed autumn slot.

Do Lukla flights still operate in monsoon?

Technically yes. Practically, expect cancellations on roughly half of the days between 15 June and 15 September because the cloud ceiling at Tribhuvan and Lukla drops below the visual-flight-rules minimums. The 2025 monsoon season saw an average 7-day backlog at peak — travellers spent up to a week waiting for a flight window. Helicopter charters from Kathmandu run when fixed-wing cannot, but cost USD 600 to 1,200 per seat. If you need certainty in June or later, do not plan a Lukla-based trek.

What gear changes for a June pre-monsoon trek?

Three additions to the standard pre-monsoon kit. One — proper rain gear: a Gore-Tex or eVent jacket and waterproof pants, not a poncho, because afternoon downpours are sudden and the wind cuts through cheaper plastic. Two — quick-dry trekking trousers and synthetic socks, no cotton, because nothing dries overnight in a teahouse from 10 June onward. Three — leech protection: ankle-high gaiters, salt sachets, and Dettol or eucalyptus oil for skin treatment. We hand a leech kit to every June-starting traveller leaving Kathmandu after 1 June.

Is Upper Mustang worth the USD 500 permit in 2026?

For travellers serious about June, July or August trekking — yes. The Restricted Area Permit costs USD 500 for the first 10 days plus USD 50 per additional day, on top of the ACAP at NPR 3,000. That is about USD 60 to USD 90 per trekking day on permits alone, two to three times what an Annapurna or Khumbu permit costs. What you get is access to a region closed to mass tourism, Tibetan Buddhist monasteries at Lo Manthang that have run for 600 years, and the only stretch of dry, dust-coloured high desert in the Nepal Himalayas. We book around 70 percent of our June and July trips into Mustang for that reason.

Trekking in Nepal in June 2026: The Pre-Monsoon Window and the Rain-Shadow Routes That Still Work

Most blogs tell you to skip Nepal in June. They are half right. The pre-monsoon window closes around 12 June 2026, but Upper Mustang and Dolpo stay dry through July — the calendar a paying traveller should use this season.

6 MAY 202610 MIN READNEPAL NEXUS

Arid high-altitude Himalayan landscape on the Manaslu Circuit, the kind of dry valley terrain that sits in the rain-shadow belt where June trekking still works in Nepal.

Most travel blogs about trekking in Nepal end the calendar at the end of May. The standard advice runs: walk in October or November for the autumn window, walk in March to early May for the spring window, and skip the rest. That advice is half right.

Monsoon does close most Nepal trekking routes from mid-June through mid-September. The Annapurna Circuit, Everest Base Camp, Langtang, Manaslu and the Three Passes loop all become brutal walks in heavy rain, low visibility and grounded Lukla flights. Anyone selling you a Khumbu trek in late June with a guarantee of summit views is selling you a story, not a trek.

The other half of the advice — that you cannot trek in Nepal at all in June, July or August — is wrong, and it costs travellers some of the best routes in the country.

Here is what we book from our Kathmandu office in June, why the pre-monsoon window is shorter than people think, and the rain-shadow routes that ignore the monsoon entirely.

When the monsoon actually breaks in 2026

The Department of Hydrology and Meteorology issued the 2026 pre-monsoon outlook in late April. The headline numbers:

Onset: 10 to 14 June across eastern and central Nepal
Rainfall outlook: above normal for the June to September window — particularly in the Gandaki and Bagmati provinces
Withdrawal: mid to late September, with the first clear post-monsoon window typically opening around 22 to 28 September

What that means in practice for a trek booked in 2026:

1 to 9 June: Pre-monsoon tail. Workable on most routes. Mornings often clear, afternoons cloud, 30 to 40 percent chance of evening rain. Lukla flights run normally except on the worst days.
10 to 15 June: Transition. The front arrives. We treat this as the cutoff for booking south-facing treks like ABC and EBC.
16 June to 15 September: Monsoon season. South-facing routes wet, leech-heavy, low-cloud. Rain-shadow routes — Mustang, Dolpo, Nar Phu — fully workable.
16 September onwards: Withdrawal begins, autumn window opens.

The practical rule we use when a traveller writes in: any trek that summits its highest point before 10 June has a fair shot. After 15 June, plan a rain-shadow trek or postpone to autumn.

The first ten days of June: a real window, not a fake one

Annapurna Base Camp in the first week of June is one of the quieter walks of the year. The autumn and spring crowds have gone home. Lodge owners have time to talk. The rhododendron bloom from April and early May has dropped, but the upper sanctuary is still green and cool.

What you trade is weather certainty. June 1 to June 5 in 2026 will likely run something like:

Clear mornings until around 10:00 to 11:00
Cloud build-up through midday
Afternoon thunderstorms 30 to 40 percent of days
Visibility of Annapurna South and Machapuchare best between 5:30 and 9:00

The 8-day Chhomrong-start itinerary works in this window because the upper sanctuary days fall on Day 4 and 5 — early in the trek, when you are still rested and a single bad-weather day does not threaten the whole trip.

By June 10, the calculation flips. Modi Khola levels rise after the first heavy rain. The Bamboo and Dovan stretches turn slick. Leeches arrive — not the metaphorical kind, the actual ones, in numbers, in the rhododendron and bamboo forest below 2,500 metres.

We will book ABC departures up to 5 June 2026. After that we steer travellers to a different region or a postponed autumn slot. The same logic applies to Annapurna Circuit, Mardi Himal and Khopra Danda.

Everest Base Camp in early June is more of a gamble. Lukla flight cancellations climb sharply after 1 June. The Khumbu walk itself is doable in the first week of June but a single grounded flight at the end can leave you stuck for three or four days. We book EBC for early June only when a traveller has at least seven days of buffer at the end of the trip.

The rain-shadow belt: where June, July and August are the season

This is the part of the Nepal trekking calendar that most blogs do not write about, because most travellers never ask.

North of the main Himalayan range, the trans-Himalayan plateau sits in the rain shadow of the Annapurna and Dhaulagiri massifs. The monsoon clouds rolling in from the Bay of Bengal drop their rain on the south face of those mountains and arrive in the high arid valleys north of them as thin, dry air. Pokhara records around 800 mm of rainfall in July. Jomsom — six days north of Pokhara on foot — records about 30 mm in the same month. Dho Tarap in Upper Dolpo averages under 20 mm.

Four routes inside this belt run their main trekking season from June to early September:

Upper Mustang

Duration: 12 to 14 days from Kathmandu
Max altitude: 3,840 m (Lo Manthang)
Permit: USD 500 for the first 10 days plus USD 50 per additional day, plus ACAP at NPR 3,000
2026 best months: Late May to mid-September

Upper Mustang is the closest you can walk to a different country without leaving Nepal. Tibetan Buddhist culture, ochre canyons, the walled city of Lo Manthang, monasteries that have run continuously since the 14th century. The trek runs from Jomsom up the Kali Gandaki gorge into a high arid landscape that looks more like Ladakh than the rest of Nepal.

We book around 70 percent of our June and July departures into Mustang. The combination of dry weather, restricted-area exclusivity (the USD 500 permit price tag keeps numbers low), and a culture that is genuinely distinct makes it the single most-asked-about monsoon-season route from our office.

Lower Dolpo

Duration: 16 to 18 days
Max altitude: 5,360 m (Numa La Pass)
Permit: USD 20 per day for Lower Dolpo Restricted Area Permit, plus Shey Phoksundo National Park entry NPR 3,000
2026 best months: Mid-June to mid-September

Lower Dolpo gives you Phoksundo Lake — turquoise, surreal, at 3,612 m and one of the deepest lakes in Nepal — and the high desert villages of Ringmo and Dho Tarap. The permits are cheaper than Upper Mustang but the logistics are harder: you fly Kathmandu to Nepalganj to Juphal, and Juphal flights cancel almost as often as Lukla.

Lower Dolpo is the right call for travellers who already trekked Mustang once and want something quieter, harder and further from the road.

Upper Dolpo

Duration: 22 to 28 days
Max altitude: 5,330 m (Saldang La)
Permit: USD 500 for the first 10 days plus USD 50 per additional day
2026 best months: Mid-June to early September

A serious commitment. Three weeks minimum on a remote trail with limited teahouse infrastructure — most nights camping or in basic homestays. We book maybe two or three Upper Dolpo trips per year. The travellers who do it never compare it favourably to anything else.

Nar Phu Valley

Duration: 11 to 13 days
Max altitude: 5,320 m (Kang La Pass)
Permit: USD 100 per week (Sep–Nov) or USD 75 per week (Dec–Aug) for restricted area, plus ACAP NPR 3,000
2026 best months: Late May to mid-September

Nar Phu sits north of the main Annapurna Circuit and behind the Annapurna massif, putting it firmly in the rain shadow. The valley splits off from the standard Annapurna Circuit trail at Koto, climbs to two Tibetan-Buddhist villages — Nar at 4,150 m and Phu at 4,080 m — and rejoins the Circuit via the Kang La Pass.

The trek is shorter than Upper Mustang, cheaper on permits in the off-peak window, and combines well with a Manaslu Circuit if you have three weeks. For travellers who want a remote restricted-area trek but cannot justify USD 500 in permits, Nar Phu is the answer.

What to skip in June 2026

Some routes get sold by less careful Kathmandu agencies in June because the agency wants the booking. Three you should walk away from if a quote arrives in your inbox for any departure after 10 June:

Everest Base Camp from 10 June onwards. Lukla flight cancellation rates climb past 50 percent. The walk itself becomes wet and grey. Even when the flight comes through, the upper Khumbu sits under cloud most mornings.
Annapurna Circuit after 10 June. Thorong La in monsoon is a serious safety call. The pass crosses ground that turns to mud, and visibility drops below 50 metres for hours at a time. We have not booked a Circuit crossing in late June since 2022.
Langtang after 5 June. The Langtang Valley sits directly under the monsoon cloud track. Bhote Koshi and Langtang Khola levels rise quickly after the first heavy rain and the trail crosses several streams that become uncrossable for hours after a downpour.

Permit and cost reality for the rain-shadow routes

Mustang, Dolpo and Nar Phu cost more per day than the standard Annapurna or Everest treks because the restricted-area permits are higher. Rough 2026 budgets, two-person basis, mid-tier lodges and homestays:

Upper Mustang, 12 days: USD 1,800 to USD 2,400 per person
Lower Dolpo, 16 days: USD 2,200 to USD 2,800 per person
Upper Dolpo, 24 days: USD 4,200 to USD 5,500 per person
Nar Phu, 12 days: USD 1,500 to USD 1,900 per person

Those numbers include permits, guide and porter, internal flights (Pokhara to Jomsom for Mustang, Nepalganj to Juphal for Dolpo), accommodation and most meals. They do not include international flights, gear purchases, helicopter evacuation insurance (USD 130 to USD 180) or tips.

The USD 500 Mustang permit feels expensive until you realise you are paying about USD 42 per day to be on a trail that gets fewer than 4,000 visitors a year — compared to roughly 60,000 on the Annapurna Circuit and 35,000 on Everest Base Camp. The crowd-density math is the strongest argument for the price.

Booking a June or monsoon-season trek from Kathmandu

The workflow we run for monsoon departures is the same as any other booking, with two extras:

1. Permit lead time. Mustang and Dolpo restricted-area permits are issued at the Department of Immigration counter in Kathmandu and require 24 to 48 hours, plus original passport, plus the guide's licence number. We will not issue a written proposal for a Mustang trek starting in less than five business days from inquiry.
2. Weather contingency. For Lower and Upper Dolpo, the Juphal flight cancellation rate runs around 25 to 35 percent in monsoon. We build a buffer day on the front end and a helicopter-evacuation budget on the back end into every Dolpo proposal.

If you are reading this in early to mid-May 2026 and want a trek booked for June, write to us this week. Permit slots for Upper Mustang in late June fill by the second week of May most years. Lower Dolpo has more room — fewer travellers attempt it.

The monsoon belt is small but real. It is also the only Nepal trekking window with no crowds, no booking pressure, and 8,000 m peaks to your south every clear morning. Worth the rain jacket and the permit cost, in our reading.

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What travellers ask about this.

Can you trek in Nepal in June 2026?: Yes, with two important conditions. First ten days of June are the tail of the pre-monsoon window — workable on most routes if you accept some afternoon cloud and a 30 to 40 percent chance of rain. From around 10 to 15 June onwards the southwest monsoon usually breaks across the Annapurna and Khumbu regions and most south-facing routes turn into mud, leeches and grounded Lukla flights. The exception is the rain-shadow belt north of the Himalayas — Upper Mustang, Lower and Upper Dolpo, Nar Phu Valley, and parts of the upper Manaslu corridor — which stay dry and walkable through July and August. The Department of Hydrology and Meteorology forecast for 2026 calls for an on-time monsoon onset around 12 June, slightly wetter than the long-term average.
When does monsoon actually start in Nepal in 2026?: The monsoon front usually crosses eastern Nepal by 8 to 12 June and reaches the western districts within five to seven days. The Department of Hydrology and Meteorology's pre-monsoon outlook for 2026 puts onset at around 10 to 14 June with above-normal rainfall expected for the June to September window. Withdrawal typically starts mid-September. Practical planning rule: any trek that summits before 10 June has a fair shot at clear mornings; after 15 June, you are committed to a monsoon-season plan.
Why are Upper Mustang and Dolpo dry in monsoon?: The Annapurna and Dhaulagiri massifs sit between the Bay of Bengal monsoon front and the trans-Himalayan plateau to the north. Monsoon clouds drop their rain on the south-facing slopes — Pokhara averages 800 mm of rain in July alone — and arrive in Mustang, Dolpo and Nar Phu as thin, dry air. Jomsom records around 30 mm in July; Dho Tarap in Upper Dolpo averages under 20 mm. That is why these routes run their main trekking season in June, July and August while every other Nepal trek closes.
Is Annapurna Base Camp doable in early June 2026?: The first week of June is the last realistic window for the 8-day Chhomrong-start ABC trek. Sanctuary mornings often clear, afternoons cloud over, evening rain runs 30 to 60 minutes. Leech pressure starts in the bamboo and rhododendron forest below Bamboo by 5 to 7 June — wear ankle-high gaiters and gaiter spray. From 12 June onwards, the upper sanctuary stays cloud-locked most days and the Modi Khola crossings become harder after heavy rain. We will book ABC departures up to 5 June 2026; after that we steer travellers to Mustang, Nar Phu or a postponed autumn slot.
Do Lukla flights still operate in monsoon?: Technically yes. Practically, expect cancellations on roughly half of the days between 15 June and 15 September because the cloud ceiling at Tribhuvan and Lukla drops below the visual-flight-rules minimums. The 2025 monsoon season saw an average 7-day backlog at peak — travellers spent up to a week waiting for a flight window. Helicopter charters from Kathmandu run when fixed-wing cannot, but cost USD 600 to 1,200 per seat. If you need certainty in June or later, do not plan a Lukla-based trek.
What gear changes for a June pre-monsoon trek?: Three additions to the standard pre-monsoon kit. One — proper rain gear: a Gore-Tex or eVent jacket and waterproof pants, not a poncho, because afternoon downpours are sudden and the wind cuts through cheaper plastic. Two — quick-dry trekking trousers and synthetic socks, no cotton, because nothing dries overnight in a teahouse from 10 June onward. Three — leech protection: ankle-high gaiters, salt sachets, and Dettol or eucalyptus oil for skin treatment. We hand a leech kit to every June-starting traveller leaving Kathmandu after 1 June.
Is Upper Mustang worth the USD 500 permit in 2026?: For travellers serious about June, July or August trekking — yes. The Restricted Area Permit costs USD 500 for the first 10 days plus USD 50 per additional day, on top of the ACAP at NPR 3,000. That is about USD 60 to USD 90 per trekking day on permits alone, two to three times what an Annapurna or Khumbu permit costs. What you get is access to a region closed to mass tourism, Tibetan Buddhist monasteries at Lo Manthang that have run for 600 years, and the only stretch of dry, dust-coloured high desert in the Nepal Himalayas. We book around 70 percent of our June and July trips into Mustang for that reason.