Upper Mustang Trek in Monsoon 2026 | Why June, July & August Are Worth It

[Trekkers Nepal]

Most people cross Nepal off their list during monsoon, and honestly, that's fair advice for most of the country. But if you know where to look, there's a corner of Nepal that barely notices the rain at all — Upper Mustang.

What Makes Upper Mustang Unique in Monsoon Season​

Tucked behind the Annapurna and Dhaulagiri ranges, Upper Mustang sits in what's called a rain shadow. Simple version: the clouds rolling in from the Bay of Bengal hit those massive mountains, dump most of their moisture on the southern side, and arrive in Mustang pretty much empty-handed. The result? Less than 300mm of rain a year, even in the wettest months. While the rest of Nepal is soggy, Mustang stays dry, sunny, and surprisingly green.

Upper Mustang Weather in June, July & August​

June brings warm, clear days (18-25°C) with cool nights and the occasional strong afternoon wind. July is similar but a touch warmer, with crystal-clear views of the desert landscape days can hit 28°C. August keeps things mild and pleasant, with daytime temps around 20-28°C and cooler nights that call for a warm layer. Across all three months, mornings tend to be calm and clear, while afternoons can get breezy so most trekkers plan their walking hours accordingly.

Why Monsoon Is Actually a Good Time for Upper Mustang Trek​

• Fewer Crowds and Peaceful Trails​

This is off-season for most of Nepal, which means Mustang's trails are quieter. You can walk at your own pace, take your time at viewpoints, and not feel rushed by crowds.

• Clear Mountain Views​

With clean skies and high visibility, you get unobstructed looks at Annapurna, Dhaulagiri, and Nilgiri towering in the distance — a pretty dramatic backdrop for a desert landscape.

• Unique Landscape​

Forget the typical green hills and forest trails. Here you're walking through dry valleys, red and yellow cliffs, and patches of monsoon greenery on your way to Lo Manthang, the old walled city once known as the Forbidden Kingdom.

• Cultural Experiences and Festivals​

If your timing lines up with August, you're in for something special. Yartung is a multi-day Tibetan Buddhist festival marking the end of monsoon think horse racing, traditional dress, folk dances, and singing. It's a genuinely fun, lively experience that most trekkers never get to see.

Challenges of Trekking Upper Mustang in Monsoon​

It's not all smooth sailing. The flight to Jomsom can get delayed or cancelled if weather turns bad, so build in a buffer day or two. The lower Mustang trail can get muddy and occasionally landslide-prone. Altitude sickness is still a factor, and since it's off-season, some teahouses may have a smaller menu or limited rooms. None of this is a dealbreaker just things to plan around.

Safety Tips for Monsoon Trekking in Upper Mustang​

Keep an eye on weather and flight updates, and don't book your return too tightly. Go with a licensed guide who knows the area. Build in rest days for acclimatization. Stay hydrated. And make sure your permits are sorted before you go.

Essential Permit Requirements​

You'll need a Restricted Area Permit (USD 50/day), an Annapurna Conservation Area Permit, and a TIMS card costs vary slightly depending on whether you're a foreign visitor or from a SAARC country.

Conclusion​

If you want dry trails, dramatic desert scenery, fewer crowds, and a real cultural experience all while the rest of Nepal is dealing with rain Upper Mustang in monsoon is one of the country's best-kept secrets.

Thinking about it? Get in touch with Trekkers Nepal we'll help you plan the right itinerary, sort out permits, and make sure you're set up for a smooth trip into Mustang. And if monsoon isn't your only window, ask us about our other seasonal treks and adventure trips throughout the year too.