Nepal does not have four seasons. It has six — and they overlap, contradict each other, and vary by altitude in ways that make a single answer to "when should I go?" impossible. The Terai lowlands can be forty degrees while the Khumbu is minus ten. The monsoon that drenches the Annapurna region leaves Upper Mustang bone-dry. The "best month" for Everest Base Camp is the worst month for Chitwan wildlife viewing. And the shoulder seasons — those uncertain weeks between the defined periods — sometimes deliver the finest conditions of all.
The honest answer to "when should I visit Nepal?" is: it depends on what you want to do, how much uncertainty you can tolerate, and whether you prefer clear skies or empty trails. October is the safe answer. But the safe answer is not always the right answer.
October — The Golden Month
This is it. The month that every guidebook recommends. The month that every trekking company promotes. The month that delivers the Nepal that the postcards promise.
The monsoon ends in late September. The air is washed clean by four months of rain. The skies clear to a blue so deep it looks fake. The mountains — Everest, Annapurna, Dhaulagiri, Manaslu, stand against this blue with a sharpness and clarity that no other month matches. The temperature is comfortable at all trekking altitudes: fifteen to twenty degrees during the day at 3,000 metres, dropping to minus five at night. The trails are dry. The teahouses are open. And the landscape, still green from the monsoon, not yet brown from winter, balances lush valleys with snow-capped peaks in a way that makes October the photographer's month.
The cost: crowds. October is peak trekking season. The EBC trail, the Annapurna Circuit, and the ABC trail are at their busiest. Teahouse rooms fill early. Suspension bridges queue. The famous viewpoints, Kala Patthar, Poon Hill, Gokyo Ri, host dozens of trekkers at sunrise. And flight prices, both international and Lukla, are at their annual highest.
Temperature ranges: Kathmandu 12-28°C. Namche (3,440m) 0-12°C. Gorak Shep (5,164m) -10 to 3°C.
November, October's Quieter Twin
November offers ninety percent of October's conditions with fifty percent of October's crowds. The skies remain clear, often clearer than October, as the last traces of monsoon moisture dissipate. The mountains are equally sharp. The trails are equally dry. But the temperature drops, noticeably at altitude, where November nights at Gorak Shep can reach minus twenty.
Early November (first two weeks) is excellent, essentially an extension of October with thinner crowds. Late November sees trails emptying rapidly as the season winds down, teahouse staff begin closing for winter, and the cold at altitude becomes genuinely challenging. Trekkers who start their EBC trek in the first week of November get the best of both worlds: October clarity with November solitude.
Temperature ranges: Kathmandu 7-24°C. Namche -5 to 8°C. Gorak Shep -15 to 0°C.
December, Winter Begins
December is the month that scares most trekkers away and rewards those who come. The skies are crystalline, winter air is the cleanest, driest, most transparent air of the year. The mountains, seen through December's atmosphere, have a sharpness that even October cannot match. The trails are empty. The teahouses are quiet. And the light, low angle, warm colour, casting long shadows across the snow, is the best of the year for photography.
The cost: cold. December nights at altitude are brutal. Minus fifteen to minus twenty-five at Gorak Shep. Minus ten to minus fifteen at Namche. Your gear list needs upgrading, heavier sleeping bag, warmer down jacket, insulated gloves, balaclava. Some teahouses above Lobuche close for winter. The menu narrows. Hot showers become a memory.
Lower-altitude treks, Langtang Valley, Poon Hill, Helambu, are more comfortable in December. The cold is manageable (minus five to plus ten), the trails are empty, and the mountain views are outstanding.
Temperature ranges: Kathmandu 2-19°C. Namche -10 to 5°C. Gorak Shep -20 to -5°C.
January and February, Deep Winter
The coldest months. The Khumbu and Annapurna regions are at their most extreme, heavy snowfall possible above 4,000 metres, high passes (Thorong La, Cho La, Larkya La) may be closed, and the cold at altitude is the kind that damages exposed skin in minutes.
January is the coldest month of the year. Trekking above 4,000 metres requires winter mountaineering gear. The trails are nearly deserted. The rewards for those who brave the cold are total solitude and the clearest views of the year.
February sees the first signs of warming. Late February, particularly the last week, begins the transition to spring. The coldest nights ease slightly. The days lengthen. And the earliest rhododendrons, at lower altitudes, below 2,500 metres, begin to show colour.
The Terai (Chitwan, Bardia) is excellent in January-February, cool, dry, and ideal for wildlife safari. Tiger sighting probability is at its annual highest as animals concentrate around water sources.
Temperature ranges: Kathmandu 2-18°C. Namche -15 to 3°C. Chitwan 8-25°C.
March, Spring Arrives
March is the beginning of the spring trekking season and, for many experienced trekkers, the most beautiful month in Nepal. The rhododendrons begin their bloom, starting at lower altitudes and progressing upward through the month. The forests on the Annapurna and Langtang trails turn crimson, pink, and white. The air warms. The days lengthen. And the mountains, still snow-covered from winter, stand above the flowering forests in a contrast, white peaks above red forests, that is unique to spring.
The visibility in March is slightly less sharp than autumn, spring air carries more moisture and haze. But the compensation, the flowers, the warmth, the sense of the Himalaya waking from winter, more than makes up for the softer skies.
Holi, Nepal's festival of colours, falls in March (exact date varies). Kathmandu during Holi is chaos, colour, and joy in equal measure.
Temperature ranges: Kathmandu 8-25°C. Namche -5 to 10°C. Gorak Shep -12 to 2°C.
April, Peak Spring
April is the spring equivalent of October, the month when conditions are most reliably good, when the rhododendron bloom reaches its peak at trekking altitudes (3,000-4,000 metres), and when the trails are busy but not as crowded as October. The visibility is good, the temperatures are warmer than autumn at equivalent altitudes, and the landscape is at its greenest.
The Annapurna region is particularly spectacular in April, the rhododendron forests between Ghorepani and Tadapani are a tunnel of colour. The Langtang Valley bloom is equally impressive. The EBC trail, while less florally dramatic (the Khumbu is above the rhododendron zone), benefits from the warmer temperatures that make the cold nights at altitude more bearable.
Late April sees the first pre-monsoon weather: afternoon cloud building from the south, occasional showers at lower altitudes, and increasing haze. These are minor, early morning views remain excellent, but they signal the approach of the monsoon.
Temperature ranges: Kathmandu 12-30°C. Namche 0-15°C. Gorak Shep -8 to 5°C.
May, The Last Window
Early May is still spring, warm, green, the last rhododendrons blooming at the highest altitudes. The trails are quieter than April as the season winds down. Prices drop. Teahouse availability improves.
Late May belongs to the monsoon's advance guard. Afternoon showers become daily. Cloud cover increases. Humidity at lower altitudes becomes oppressive. High passes may receive late-season snow. The transition from trekking weather to monsoon weather happens over approximately two weeks, and timing it correctly, or incorrectly, is the gamble of a May trek.
Upper Mustang is excellent in May, the rain shadow keeps it dry while the rest of Nepal gets wetter.
Temperature ranges: Kathmandu 18-32°C. Namche 3-15°C.
June to September, The Monsoon
The monsoon arrives in early June and departs in late September. For four months, Nepal receives the vast majority of its annual rainfall, heavy, daily, often dramatic. The lower elevations are hot, humid, and leech-infested. The trails are muddy and slippery. Landslides close roads and occasionally trails. Visibility drops to metres on bad days. And the mountains, the reason most visitors come, are hidden behind cloud for weeks at a time.
The monsoon is not a good time for most trekking. But it is not a dead season either.
Upper Mustang sits in a rain shadow behind the Annapurna and Dhaulagiri ranges. While the rest of Nepal drowns, Mustang basks in dry warmth. The landscape, desert canyons, painted caves, medieval walled cities, is at its most vivid. June to September is Mustang's best season.
Dolpo also benefits from the rain shadow, though access is more difficult.
The Terai, Chitwan, Bardia, is hot and wet. The national parks are open but jungle walks are uncomfortable and leeches are abundant. Not recommended.
Rafting is at its best during monsoon, the rivers are full and the rapids are at their most exciting. The Trishuli, Bhote Koshi, and Sun Koshi offer world-class whitewater.
Temperature ranges: Kathmandu 20-30°C (humid). Terai 25-38°C.
Festivals by Month
January-February: Losar (Tibetan New Year), Maghe Sankranti. March: Holi (festival of colours). April: Bisket Jatra (Bhaktapur New Year), Nepali New Year. May: Buddha Jayanti (Buddha's birthday). August-September: Teej (women's festival), Indra Jatra (Kathmandu). October: Dashain (biggest festival, 15 days). October-November: Tihar/Deepawali (festival of lights), Mani Rimdu (Tengboche). November-December: Chhath (Terai sun worship).
Timing your visit to coincide with Dashain (October) or Tihar (November) adds a cultural dimension that no other month provides. The festivals are not tourist events, they are genuine celebrations that transform the country, and being present during them is one of the great cultural experiences of South Asian travel.
The Honest Recommendation
If you want the safest bet: October. Clear skies, stable weather, everything open. Accept the crowds.
If you want the best value: Early November or late March. Near-peak conditions, fewer people, lower prices.
If you want solitude: December or late November. Bring warm gear. Accept the cold. Enjoy the empty trails.
If you want flowers: April. The rhododendron bloom is extraordinary.
If you can only travel in summer: Upper Mustang. The rain shadow turns Nepal's worst season into Mustang's best.
If none of these apply, the truth is this: there is no bad month to visit Nepal. There are months with more rain. Months with more cold. Months with more crowds. But there is no month when the mountains are not magnificent, the people are not welcoming, and the dal bhat is not served with a smile and a second helping. Nepal works year-round. The question is not whether to go, but what you are willing to accept, and what you will find, when you arrive.
