TrekkrOS | Plan, book and track your Nepal trek

Spring

Mar–May

Best

Rhododendrons, clear skies, warm daytime. Peak crowding from mid-April.

Monsoon

Jun–Aug

Avoid (mostly)

Heavy rain, leeches, trail mud. Exception: Upper Mustang & Dolpo stay dry.

Autumn

Sep–Nov

Best

Clearest skies of the year. October is peak, busiest and most expensive.

Winter

Dec–Feb

Possible

Cold at altitude, high passes may close, but beautiful quiet on low routes.

Monthly Trek Score, All Routes

Combined weather + crowd + value index per month (1–5)

Jan

2.5

Feb

3.0

Mar

4.0

Apr

5.0

May

4.5

Jun

1.0

Jul

1.0

Aug

1.0

Sep

3.5

Oct

5.0

Nov

4.0

Dec

2.5

Best

Good

Avoid

Route Seasonal Matrix

Season-by-season verdict for every major trekking route

Route	Spring Mar–May	Monsoon Jun–Aug	Autumn Sep–Nov	Winter Dec–Feb
Everest Base Camp	Best, clear, rhododendrons peak	Avoid Avoid, leeches, fog, trail mud	Best, crystal clear skies, peak trekker season	Possible, cold, quiet, some snow on pass
Annapurna Circuit	Spectacular rhododendron bloom below 3,500m	Avoid Very wet below 3,000m, leeches, landslides	Best weather window, clearest mountain views	Thorong La (5,416m) may close after heavy snow
Annapurna Base Camp	Beautiful but busy, moderate trail congestion	Leeches below Modi Khola, rain above 2,500m	Perfect conditions, best clarity of the year	ABC sometimes snowbound, lower sections fine
Poon Hill	Rhododendron forests at peak, iconic pink trails	Possible, wet but lush; some views open briefly	Crystal panoramas of Annapurna and Dhaulagiri	Quiet and beautiful, cold nights but manageable
Langtang Valley	Excellent, yak pastures green, good visibility	Possible but leeches and rain common below 3,000m	Best season, stable weather, clear mountain views	Cold nights at Kyanjin (3,870m), doable but cold
Upper Mustang	Good, Tiji Festival in May, slightly dusty	BEST, rain shadow zone stays dry while rest of Nepal is wet!	Good, windy, Lo Manthang beautiful in fall light	Very cold, some lodges closed, limited services
Manaslu Circuit	Pre-monsoon is excellent, Larkya La clear	Avoid Extremely wet + Larkya La (5,160m) dangerous	Best, clear skies, dramatic high-altitude views	Larkya La often snowbound, restricted access
Kanchenjunga	Apr–May, pre-monsoon clarity, rhododendrons	Avoid Heavy monsoon, trails flooded, dangerous crossings	October–November best, post-monsoon clarity	Very remote + cold, not recommended without experience

Secret Windows, Less Crowds, Same Beauty

Shoulder season slots that give you the same views with 20–50% fewer trekkers

Late September, Before the October Rush

Sep 15–30

20–30% fewer trekkers than October peak. Skies clear post-monsoon but crowds haven't peaked yet.

~15% cheaper·Low–Moderate

EBCAnnapurna CircuitLangtang

Early March, Spring Pre-Season

Mar 1–20

Rhododendrons starting, very few trekkers, operators eager for business. Cold but clear.

~20% cheaper·Low

EBCLangtangPoon Hill

December Poon Hill

Dec 1–20

Snow-dusted rhododendron forests, almost no other trekkers, crisp mountain panoramas. Low altitude means manageable cold.

~25% cheaper·Very Low

Poon Hill / Ghorepani

June–August: Upper Mustang

Jun–Aug

Nepal's best-kept secret, monsoon rain shadow means completely dry while rest of Nepal is soaked. Unique Tibetan culture.

Same price·Low

Upper MustangDolpo (Lo Manthang)

Climate Intelligence Note, Updated Mar 2026

Climate change is shifting Nepal's optimal trekking windows. Since 2020, mid-October to December has become increasingly favourable for Everest and Annapurna routes, fewer pre-season storms, extended clear windows into November. Spring rhododendron bloom is now peaking ~1–2 weeks earlier than historical norms. This widget updates annually based on DHM Nepal meteorological data.