When Is the Best Time to Trek in Nepal?
Published
Nepal has two main trekking seasons — autumn and spring — and two periods that are significantly harder to trek in: winter and the monsoon. Understanding the difference will shape everything from visibility and trail conditions to crowd levels and teahouse availability.
Autumn — October and November — is universally regarded as the best time to trek in Nepal. The monsoon rains have washed the skies clean, the air is crisp, and the views of the high peaks are at their clearest and most dramatic. Daytime temperatures in the mid-altitude zones (2,500 to 3,500 metres) are comfortable, ranging from 10°C to 18°C. Nights get cold, especially above 4,000 metres, where you can expect sub-zero temperatures. The trails are dry, the passes are open, and the rhododendron forests — though not yet in bloom — are lush and green from the recent rains. The downside: October is the busiest month of the trekking year. Everest Base Camp and Annapurna Circuit trails are packed, teahouses fill up, and you'll rarely be alone on popular routes. Book accommodation in advance for October on any major trail.
Spring — March, April, and May — is the second-best window and, for many trekkers, actually the more beautiful one. The rhododendrons bloom explosively from late February through April, painting the hillsides red and pink, particularly on the Ghorepani-Poon Hill circuit and the lower Annapurna approaches. Temperatures are warmer than autumn at all elevations, which is welcome above 5,000 metres. Skies are generally clear through April; May brings some pre-monsoon cloud buildup in the afternoons, but mornings are usually stunning. This is also the primary Everest climbing season, which means EBC trail sees heavy expedition traffic from late March through May. If you want to time it well, late March and early April offer the bloom plus manageable crowds.
Winter — December, January, and February — is trekking at a lower volume and with greater challenge. High passes like Thorong La (5,416 metres) on the Annapurna Circuit are frequently closed due to snow. Lower-elevation treks like Ghorepani-Poon Hill, the Langtang Valley lower sections, and parts of the Annapurna foothills remain accessible and are beautiful in winter — often empty and blanketed in snow at higher points. The cold is severe but manageable with the right gear. If you want solitude and don't mind the cold, February is the sweet spot: days start to lengthen, the Himalayan high-pressure system brings stable, clear weather, and trails to popular viewpoints like Poon Hill are mostly snow-free. Avoid January on high-altitude routes.
Monsoon — June through September — is genuinely challenging for most treks. The rain is heavy, persistent, and turns trails into slippery mud slides. Leeches appear in the forests below 2,500 metres. Views are almost entirely blocked by cloud and mist. That said, the rain-shadow regions of Nepal — Mustang and Dolpo, lying north of the Himalayan crest — receive very little monsoon precipitation. Upper Mustang in particular is a fascinating desert landscape that is best visited precisely during the monsoon months when the rest of Nepal is wet. If you can get a permit (which is more expensive and regulated), trekking in Mustang from June to August gives you something almost no one else experiences.
To summarise: plan for October or late March to mid-April for the best overall experience. Go in November or late April if you want fewer people. Pick winter for the lower routes if solitude matters more than warmth. And if you're curious about the rain-shadow regions, don't be afraid of the monsoon.