Best Time to Trek in Nepal: Month-by-Month Verdict (2026)

The short answer: October to November for the clearest skies, or March to April for warmer days and rhododendron forests. Those are the two classic windows, and they earn their reputation.

But “trek in autumn or spring” is where most guides stop. It shouldn’t be. The right month depends on which trek you’re doing, how much you mind crowds, and whether you know about the flight diversion that catches most Everest trekkers by surprise.

I live in Kathmandu and this is the question I get asked most. Here is the full answer.

Quick reference: Nepal trekking seasons at a glance

Autumn (late September to November): the gold standard

The monsoon washes the dust and haze out of the air by late September. What’s left is the clearest mountain visibility of the year.

Daytime temperatures at teahouse altitudes are comfortable. Nights get cold above 4,000m but stay manageable with a good sleeping bag. Weather systems are stable, which matters more than temperature stable weather means fewer blocked passes and fewer cancelled flights.

October also brings Dashain and Tihar, Nepal’s biggest festivals. You’ll see them in every village you walk through.

The honest downside: everyone knows autumn is best. EBC and the Annapurna Circuit are at their most crowded. Teahouses in Namche and Dingboche fill up. If you’re trekking independently in the Annapurna region, start walking early each day or you’ll be choosing between the last two rooms in the village.

Choose autumn if: this is your one shot at Nepal and you want the mountains at their best. Skip it if: crowds ruin the experience for you go late November instead, when the trails empty out and the skies stay clear. It’s colder, but that’s the trade.

Spring (March to April): warmth, flowers, and expedition energy

Spring is the second pick, not a consolation prize. Days are longer and warmer than autumn. Rhododendron forests between 2,000m and 3,500m the whole Poon Hill and lower ABC corridor flower in March and April.

Spring is also expedition season. If you trek to Everest Base Camp in April, you’ll walk through a working climbers’ camp rather than an empty moraine. For a lot of people that’s a highlight.

The honest downside: haze. Pre-monsoon heat builds dust and humidity in the air, especially below 3,000m. Views from lower viewpoints are softer than in autumn. Get above 3,500m and it matters much less.

By May, heat and humidity peak and the season winds down. Treat mid-May as the closing bell.

Choose spring if: you want warmer trekking, flowering forests, or the expedition-season atmosphere. Skip it if: razor-sharp photography visibility is your whole reason for coming. That’s autumn’s job.

Winter (December to February): the underrated window

Winter doesn’t close Nepal. It closes the high passes.

Heavy snow can shut Thorong La on the Annapurna Circuit and makes Larkya La on Manaslu a serious undertaking. Nights above 4,000m drop well below -10°C. Some high teahouses shut for the season.

But treks that top out below roughly 4,000m stay open and are arguably at their best. Poon Hill, Mardi Himal, and lower Langtang give you clear winter skies, empty trails, and teahouse owners with time to talk. Kathmandu daytime weather is cold but dry.

Pack real thermals. Budget hotels in Kathmandu and most teahouses have no heating.

Choose winter if: you want peak-season visibility without peak-season crowds, and you’re happy on a lower-altitude trek. Skip it if: your heart is set on a high pass. Don’t gamble on Thorong La in January.

Monsoon (June to mid-September): skip it with two exceptions

From June to mid-September, rain floods trails, leeches come out in force, clouds bury the peaks, and landslides close roads. Lukla flights get cancelled for days at a stretch. For the classic treks, this is the season to avoid, full stop. Any agency selling you a July EBC trek at a discount is selling you the discount, not the trek.

The exceptions are real, though. Upper Mustang and Dolpo sit behind the main Himalayan wall in the rain shadow. While the rest of Nepal is soaked, these Tibetan-plateau valleys stay warm and dry. Monsoon is genuinely their best season. Both are restricted areas requiring special permits and a registered guide see the permit guide linked below.

Choose monsoon if: you’re going to Upper Mustang or Dolpo specifically. Skip it for: everything else.

The peak-season catch nobody mentions: the Ramechhap flight diversion

If you’re trekking in the Everest region, the best-time question has a logistics consequence that most guides leave out.

During peak seasons, the Civil Aviation Authority of Nepal diverts most Lukla flights away from Kathmandu to Manthali Airport in Ramechhap. That means a 4–5 hour drive east, leaving your Kathmandu hotel between 1:00 and 2:00 AM, before a 20-minute flight to Lukla.

It’s not a dealbreaker. Flights from Manthali are actually more reliable the airport sits lower, closer to Lukla, and outside Kathmandu’s runway congestion. But it turns your first trek day into a very long one, and trekkers routinely find out the night before.

Trek in the off-peak margins (early September, December) and you’re more likely to fly direct from Kathmandu. Trek in October–November or March–May and plan for the Ramechhap run. Verify the current arrangement close to your dates CAAN sets it season by season.

Month-by-month verdict table

So when should you actually book?

If you want one answer: mid-October to mid-November. Clearest skies, stable weather, festivals, everything open. Accept the crowds and the Ramechhap drive as the price.

If you want the contrarian answer: late November or early December. You keep 90% of the visibility and lose 80% of the crowds. That’s the window I’d pick for a second trip.

One more thing, whatever month you choose: check that your travel insurance covers trekking above 3,000m. Standard policies often exclude it, and every classic Nepal trek goes higher than that.

FAQ

What is the best month to trek in Nepal?

October is the single best month. The monsoon has cleared the air, skies are at their clearest, weather is stable, and all routes and teahouses are open. The trade-off is that October is also the busiest month on popular trails.

Can you trek in Nepal during monsoon?

Mostly no. June to mid-September brings heavy rain, leeches, poor visibility, and landslide risk on classic routes. The exceptions are Upper Mustang and Dolpo, which sit in the Himalayan rain shadow and stay dry monsoon is their best season.

Is winter trekking in Nepal possible?

Yes, on treks below about 4,000m. Poon Hill, Mardi Himal, and lower Langtang offer clear skies and empty trails in December–February. High passes like Thorong La may close under snow, and nights above 4,000m drop below -10°C.

Is spring or autumn better for Everest Base Camp?

Autumn (October–November) has clearer visibility; spring (March–April) is warmer and coincides with climbing expedition season, so Base Camp itself is alive with activity. Both are excellent. Photographers should lean autumn; everyone else can choose on atmosphere.