Best Season for Annapurna Circuit Trek 2026: Honest Month-by-Month Breakdown

The Annapurna Circuit doesn't have one perfect season; it has windows, and choosing the wrong one can mean a Thorong La crossing in waist-deep snow or a Marsyangdi valley swimming in leeches. We coordinate treks across this region every month of the year, and the honest truth is that timing decides more than your gear or fitness ever will. This breakdown gives you the real conditions month by month, plus the permits, costs, and safety facts you need for a 2026 departure.

Quick Answer: When Should You Trek the Annapurna Circuit in 2026?

The best season for the Annapurna Circuit in 2026 is autumn, specifically late September through November, with October offering the clearest skies and the safest Thorong La Pass (5,416 meters) crossing. Spring, from March to May, is the strong second choice with rhododendron blooms and stable weather. Winter and monsoon bring real risks.

Understanding the Circuit's Geography and Why Season Matters

The classic route climbs from the subtropical Marsyangdi valley near Besisahar up through Chame, Pisang, and Manang, then over Thorong La Pass (5,416 meters) down to Muktinath and Jomsom in the dry Mustang region. This single trail crosses several climate zones in one trip.

Because you pass through monsoon-soaked lowlands and a high-altitude desert in the same trek, no single weather pattern applies across the whole route. That is exactly why month-by-month planning matters so much here.

The crux is always the pass. Thorong La is exposed, high, and prone to early-morning ice and afternoon wind. Your chosen month directly affects whether that crossing is straightforward or genuinely dangerous.

Month-by-Month Breakdown for 2026

Here is the honest seasonal reality across the full calendar. Conditions shift sharply with altitude, so we describe both the lower valley and the high section around the pass.

January & February (Deep Winter)

January and February deliver crisp, stable skies and almost empty trails, but the high section is genuinely cold and the pass is frequently snowed shut. Daytime lower-valley walking is pleasant, while nights above 3,500 meters drop well below freezing and many high lodges in Thorong Phedi close.

If Thorong La receives heavy snow, the crossing becomes impassable for days. We see winter trekkers either turn back at Manang or shorten the trip to the Manang valley and fly out. Only experienced winter trekkers with strong gear and flexible dates should attempt the full circuit in these months.

March (Early Spring)

March opens the spring window. Lower elevations warm up, rhododendron forests begin to bloom around 2,000 to 3,000 meters, and the pass starts to clear of winter snow by mid-to-late month. Mornings are clear; afternoon haze can build in the lower valley.

Early March can still carry residual snow on Thorong La, so a guide who checks current pass conditions is valuable. By the last week, conditions are usually reliable for a careful crossing.

April & May (Peak Spring)

April and May are arguably the best balance of warmth, color, and long daylight. Rhododendrons peak, temperatures are comfortable for the climb, and the pass is generally clear of dangerous snow. This is one of our two recommended seasons.

The trade-off is afternoon haze that softens distant peak views, plus a pre-monsoon heat building in the lowlands by mid-May. Trails are busy but not crowded. Late April hits the sweet spot for most trekkers.

June, July & August (Monsoon)

The summer monsoon brings heavy rain to most of the lower and middle circuit, muddy trails, leeches in the forest zones, and frequent landslide-related road closures on the access routes. We generally steer trekkers away from the standard circuit during these months.

There is one important exception. The upper sections beyond the main Himalayan crest, including Upper Mustang and the Jomsom-to-Muktinath stretch, sit in the Himalayan rain shadow and stay relatively dry. If you must travel in summer, those rain-shadow zones become premier destinations while the rest of Nepal floods. See our notes on the Annapurna Circuit during monsoon before committing.

September (Late Monsoon to Early Autumn)

Early September is still wet, but the back half of the month is transformative. As the monsoon retreats, the air clears, vegetation is lush and green, and crowds have not yet arrived. The pass is usually open and snow-free.

The risk in early September is lingering rain and the occasional washed-out road section on the drive in. From around the third week, conditions usually stabilize into excellent trekking. Read our September vs October comparison to fine-tune your dates.

October (The Gold Standard)

October is the single most reliable month on the Annapurna Circuit. Skies are crisp and clear, mountain views are sharp, temperatures are moderate at altitude, and Thorong La is typically in its safest, most predictable state of the year.

The cost is popularity. The trail and lodges fill up, especially around the Dashain and Tihar festival period, so book accommodation and your flights early. We still rank October first for a reason; for deeper planning see our overview of trekking in October and why October works so well.

November (Stable and Clear)

November keeps October's clear visibility while the crowds thin out. Air is dry and stable, peak views are arguably the cleanest of the year, and nights grow progressively colder as the month moves toward winter.

Late November can deliver bitterly cold pre-dawn temperatures on the pass and the first risk of early winter snowfall. If you want clear skies without October's crowds, mid-November is excellent.

December (Early Winter)

December offers stunning clarity and quiet trails but demands cold-weather discipline. Lower-valley days remain walkable, while the pass section turns genuinely harsh and the first heavy snows can shut Thorong La with little warning.

Early December can still be done by well-prepared trekkers with flexible schedules; late December edges into full winter conditions where many high lodges close.

Season Comparison at a Glance

Use this matrix to match your priorities, whether that's clear views, quiet trails, or a reliable pass crossing.