🌸 Spring (Mar–May)
Rhododendrons bloom across the hills and the trekking trails are alive with colour. Clear mornings give superb mountain views, and it's the top season for Everest Base Camp and Annapurna treks. Warm in the lowlands.
Best for: trekking, mountain views, Chitwan before the heat.
🌧️ Monsoon (Jun–Aug)
The hills turn brilliant green and prices drop, but rain, leeches and clouds can obscure the peaks. It's the ideal time for the rain-shadow regions of Mustang and Upper Dolpo, which stay dry behind the Himalaya.
Best for: Mustang, lush landscapes, fewer crowds, budget travel.
🍂 Autumn (Sep–Nov)
The peak season — crisp, clear skies, stable weather and the year's best Himalayan panoramas. It coincides with the great festivals of Dashain and Tihar. Book treks, flights and hotels well ahead.
Best for: everything — trekking, sightseeing, festivals, photography.
❄️ Winter (Dec–Feb)
Cold in the mountains with snow at altitude, but the days are often bright and the Kathmandu Valley and Terai are pleasant. Lower treks like Poon Hill stay doable, and Chitwan and Lumbini are at their best.
Best for: Chitwan, Lumbini, the Terai, low-altitude treks, clear valley views.