Best Time to Visit Nepal: Month-by-Month Weather & Travel Guide

For most visitors, the best time to visit Nepal is the post-monsoon autumn window of October and November. The summer monsoon normally withdraws from Nepal around 2 October, according to the Department of Hydrology and Meteorology (DHM), leaving washed, dust-free air and the year's most reliable Himalayan views. Climate normals for Kathmandu show October averaging a pleasant 25.8°C by day and 13°C at night with only about 59 mm of rain, falling to roughly 8 mm in November — the driest month of the year in the capital.

Spring, from March to April, is the second-best window. Days are warm (Kathmandu normals of 24–27°C), rhododendron forests bloom across the mid-hills, and the main trekking routes reopen after winter. The trade-off is that haze and dust build up in the lowlands and valleys as the pre-monsoon season advances, so distant mountain views are generally less crisp than in autumn, and afternoon thunderstorms become more frequent by May.

Visitor statistics confirm this seasonal pattern. Of the 1,147,567 foreign tourists Nepal received in 2024 (Nepal Tourism Board data), the busiest months were March (128,167 arrivals), October (124,393), November (114,501) and April (111,376). That said, there is no single perfect month for the whole country: the monsoon is actually the best season for trans-Himalayan rain-shadow treks, and winter is arguably the finest time for Terai wildlife safaris.

This guide is built on climatological normals — 30-year station averages published by the Department of Hydrology and Meteorology, Nepal's national weather agency under the Ministry of Energy, Water Resources and Irrigation — rather than forecasts. Normals (currently referenced to the 1991–2020 period, with earlier 1981–2010 normals supplied to the World Meteorological Organization) describe what a typical year looks like; any individual year can deviate, so always check DHM's actual forecasts closer to travel.

Meteorologically, Nepal has four seasons: winter (December–February), the hot pre-monsoon (March–May), the summer monsoon (June–September) and the post-monsoon (October–November). The monsoon normally enters eastern Nepal on 13 June and covers the rest of the country within about a week; its normal withdrawal date is 2 October, giving a typical duration of around 112 days. Crucially, roughly 80% of Nepal's annual rainfall falls in the June–September monsoon, which is why the seven or eight months outside it are so dry and travel-friendly.

Altitude shapes local climate far more than latitude. The Terai plains (below about 300 m) are subtropical, with summer heat that can exceed 35°C; the mid-hills, including the Kathmandu Valley (about 1,300 m) and Pokhara (about 800 m), are temperate; and the high Himalaya is alpine, with temperatures falling roughly 6°C for every 1,000 m gained. North of the main Himalayan range, valleys such as Mustang and Dolpo sit in a rain shadow and stay semi-arid even at the height of the monsoon.

The grid below uses Kathmandu's climate normals (daytime maximum / night-time minimum / monthly rainfall) as the national reference point, with notes on trekking suitability and major festivals. Remember that most Nepali festivals follow lunisolar calendars — Bikram Sambat (BS) and lunar dates — so their Gregorian (AD) dates shift from year to year.

In broad terms, the first half of the year moves from cold, crystal-clear winter weather through an increasingly warm and hazy spring into the arrival of the monsoon in mid-June.

The second half of the year contains both Nepal's wettest weather and its very best. July and August are the heart of the monsoon; September is a transition; and October–November is the celebrated post-monsoon peak, when most of the year's trekkers arrive and the biggest festivals fill the calendar.

December then returns the country to cold, dry, stable winter conditions — quieter, cheaper and still excellent at lower elevations.

Kathmandu is at its best in October and November: mild days, cold-but-not-freezing nights, minimal rain and the Dashain–Tihar festival sequence. March and April are the runners-up, trading some visibility for warmth and spring colour. Winter days in the valley are usually sunny and fine for sightseeing at Pashupatinath, Boudhanath, Swayambhunath and the Durbar Squares, but nights fall to around 2–3°C and unheated rooms feel cold. July and August, with 300–360 mm of monthly rain, are the months to avoid if mountain views matter.

Pokhara follows the same calendar but with far more dramatic rainfall. Sitting directly in the path of moisture-laden monsoon winds below the Annapurna massif, Pokhara records about 3,900 mm of rain a year — nearly three times Kathmandu's roughly 1,425 mm — with about 940 mm in July alone. The best months to visit Pokhara are therefore October and November, when normals show just 140 mm falling to 18 mm of rain, warm 24–27°C days and postcard reflections of Machhapuchhre in Phewa Lake; February to April is the good second window.

The Terai runs on an opposite logic: winter is high season. From October to March, Chitwan and Bardia national parks and the Koshi Tappu Wildlife Reserve enjoy dry, mild days ideal for jungle activities, with migratory birds present from about November to February. December–January mornings can be foggy and surprisingly chilly. February to April, after the annual grass cutting thins the tall elephant grass, offers the best visibility for rhino and tiger sightings, though heat builds sharply from April. During the monsoon, rivers flood and many jungle activities are suspended.

Autumn (roughly late September to early December, peaking in October–November) is the classic trekking season on Nepal's southern slopes. Post-monsoon air is at its clearest, daytime temperatures at 3,000–4,000 m are comfortable, and precipitation normals are near their annual minimum. Everest Base Camp, the Annapurna Circuit, Annapurna Base Camp, Langtang and Manaslu are all in prime condition — and at their busiest, so lodges on popular routes and flights to Lukla should be booked well ahead.

Spring (March to May) is the second major season, warmer at altitude and famous for rhododendron forests between about 2,000 m and 3,500 m; it is also the main mountaineering season, with Everest summit bids concentrated in May. Expect more afternoon cloud build-up and valley haze than in autumn. Winter trekking is feasible and beautifully quiet at lower elevations, but crossings such as Thorong La (5,416 m) and the Everest high passes can be blocked by snow, and night temperatures at altitude are severe.

The monsoon (June–September) is the season to avoid on standard south-side routes: trails are slippery and leech-infested, landslides cut roads, clouds obscure the peaks for days, and Lukla and Jomsom flights are frequently cancelled. The important exception is the trans-Himalayan rain shadow, covered below.

North of the Annapurna and Dhaulagiri ranges, the mountains wring almost all the moisture out of the monsoon winds before they cross the main Himalayan crest. Jomsom in Mustang records only around 260–320 mm of precipitation a year — less than a tenth of Pokhara's total on the other side of the massif — and Upper Mustang and Upper Dolpo are drier still. These semi-arid, Tibetan-plateau-like landscapes stay largely rain-free even in July and August.

That makes June to September the prime window for Upper Mustang, Upper and Lower Dolpo, Nar Phu and the Muktinath side of the Annapurna Circuit — precisely when the rest of Nepal is at its wettest. Skies are relatively settled, high pastures are green, and the famous Tiji festival in Lo Manthang (a three-day masked-dance festival held on lunar dates, usually in May) precedes the season. These are restricted areas: Upper Mustang, for example, requires a special permit costing US$500 per person for the first 10 days, arranged through a registered trekking agency.

The practical caveat is access. Reaching the rain shadow means crossing monsoon-affected country first — the Pokhara–Jomsom flight is weather-dependent and the Beni–Jomsom road is landslide-prone in the wet season — so build one or two buffer days into any monsoon itinerary.

Nepal's biggest festivals cluster in the peak autumn season. Dashain (Ashwin/Kartik BS, usually late September–October) and Tihar (Kartik BS, October–November) are magnificent to witness, but they also trigger the year's largest domestic travel movement: buses and internal flights sell out, and many offices and some businesses close for days around the main tikā days. Booking transport and popular trekking lodges several weeks ahead is essential for October and November travel; spring visitors should do the same for the Everest region in April–May.

Shoulder months reward flexible travellers. Early-to-mid September and early December offer near-peak conditions with thinner crowds and better prices, at the cost of slightly higher weather risk — a late monsoon withdrawal in September, or early cold snaps and snow at passes in December.

Finally, treat everything above as a climatological baseline, not a promise. DHM records show the monsoon's actual onset has ranged from late May to late June, and its withdrawal from early September to mid-October, and rainfall is becoming more erratic with climate change. Before you commit to dates, check DHM's current forecasts and seasonal outlooks (dhm.gov.np and mfd.dhm.gov.np), and keep contingency days for mountain flights in any season.