The best time to visit Mustang, Nepal, depends on whether you’re exploring Lower Mustang or venturing into the more remote and arid Upper Mustang. Both areas are best visited during specific seasons for favorable weather and clear views.

1. Spring (March to May)

• Weather: Mild temperatures and clear skies.
• Landscape: The valleys and hills of Lower Mustang are vibrant with blooming rhododendrons, while Upper Mustang’s barren beauty is accentuated.
• Activities: Ideal for trekking and exploring the ancient Tibetan-influenced culture.
• Highlights:
  • Perfect time for the Jomsom Muktinath Trek or the Upper Mustang Trek.
  • Comfortable trekking conditions without extreme cold or heat.

2. Autumn (Late September to Early November)

• Weather: Cool, dry, and stable with clear skies.
• Scenery: Pristine mountain views and golden-hued landscapes.
• Activities: Trekking and cultural exploration are at their peak.
• Highlights:
  • Best time to see the Annapurna and Dhaulagiri ranges from Lower Mustang.
  • Explore Upper Mustang’s medieval villages, monasteries, and Lo Manthang in ideal weather.

3. Monsoon (June to Early September)

• Unique Advantage: Mustang lies in the rain shadow of the Himalayas, meaning it remains largely dry even during monsoon season.
• Weather: Warm and dry in Upper Mustang, but Lower Mustang might see occasional rain.
• Activities:
  • Great time for Upper Mustang treks as the rest of Nepal’s trekking regions are affected by rain.
  • Avoid crowded trails, as fewer trekkers visit during this time.
• Highlights: Explore lush vegetation in Lower Mustang and the stark desert landscapes of Upper Mustang.

4. Winter (December to February)

• Weather: Extremely cold in Upper Mustang, with temperatures dropping below freezing at night.
• Activities:
  • Suitable for those who enjoy solitude and snow-covered landscapes.
  • Roads and trails may be blocked due to snow, particularly at higher altitudes.
• Highlights:
  • Lower Mustang, including Jomsom and Kagbeni, remains accessible.
  • Cultural festivals like Tiji Festival (if held early).

Key Factors to Consider

• Festivals:
  • The Tiji Festival, a 3-day Tibetan Buddhist celebration in Lo Manthang (Upper Mustang), usually takes place in May or June.
• Permit Requirements:
  • Upper Mustang trek requires a Restricted Area Permit ($500 for 10 days).
  • Annapurna Conservation Area Permit (ACAP) is also mandatory.