Nepal has three climates stacked on top of each other, and the month that suits one is often wrong for another. The Tarai is subtropical and hot for most of the year. The middle hills are temperate and comfortable in almost every season except the monsoon. Above 3,500 metres it is cold whenever there is no sun on you. October and November are the best all-round months; June to September is the monsoon.
The three zones
Almost every disagreement about when to visit Nepal comes from people talking about different altitudes. The Tarai plains sit near sea level, run from mildly warm to genuinely punishing, and are at their best from November to February. The middle hills, roughly 1,000 to 3,000 metres, are pleasant most of the year and are where most people spend most of their time. The high Himalaya is a separate proposition: cold at night year-round, snowbound in winter above the passes, and in the rain shadow to the north of the main chain it stays dry through the monsoon.
The month-by-month table
| Month | Tarai | Middle hills | High mountains | Visibility and crowds |
|---|---|---|---|---|
| January | Cool, thick morning fog, mild afternoons | Cold nights, sunny days | Deep cold, passes snowbound | Sharp views, very quiet |
| February | Warming, fog easing | Cold early, mild by month end | Cold, snow lying high up | Clear, quiet |
| March | Hot afternoons begin | Warm, low rhododendron in flower | Cold, passes starting to open | Haze building, moderate |
| April | Hot and dry | Warm, main rhododendron bloom | Milder days, cold nights | Hazy from mid-morning, busy |
| May | Hottest month, pre-monsoon storms | Hot afternoons, evening thunder | Warmest high-country month | Poor visibility, thinning crowds |
| June | Hot, humid, monsoon arrives | Rain from mid-month | Cloud south of the range | Views largely gone, quiet |
| July | Wet and heavy | Wet, green, leeches | Dry in the rain shadow | No views except behind the range |
| August | Wet, floods possible | Wettest weeks, landslides | Rain shadow at its best | Very quiet |
| September | Monsoon easing late | Rain tailing off, still green | Clearing from mid-month | Improving fast, quiet early |
| October | Warm and dry | Ideal, warm days, cool nights | Clear and cold, passes open | Best visibility, busiest month |
| November | Pleasant, cooling | Cool, dry, very clear | Cold nights, stable weather | Excellent views, busy easing |
| December | Cool, fog returning | Cold nights, bright days | Deep cold, high routes closing | Very clear, quiet |
How to read that if you only have two weeks
For mountains, take October or November. For wildlife in the Tarai, take February to April, when the grass has been cut and burnt back and animals come to water — the seasonal detail is in our Bardiya tiger guide. For birds, take the winter, when migrants are on the wetlands; Ghodaghodi Lake is the obvious stop in the far west. For flowers, take April. For the trans-Himalayan districts, take the monsoon, which is the one season they are reliably dry.
If your dates are fixed and awkward, the fix is usually altitude rather than a different country. May is unbearable in Nepalgunj and fine at 3,000 metres. January is bitter in Jumla and delightful in Bardiya.
Two things the table cannot show
The first is haze. Spring reads well on paper — warm, dry, flowers — and disappoints people who came for mountains, because the pre-monsoon dust closes the view by mid-morning. Autumn air is a different substance entirely. If the Himalaya is the point of the trip, weight visibility above temperature.
The second is altitude, which does not appear in any weather table but decides how the trip actually feels. Going high fast is uncomfortable in every month of the year, and the schedule matters more than the season — see our guide to acclimatisation in Nepal. Festival dates move with the lunar calendar and can reshape a fortnight's travel on their own, so check them against your dates in the festival calendar. The regional version of all of this, for the west specifically, is in the West Nepal seasons guide.
Frequently Asked Questions
What is the best month to visit Nepal?
October for weather and mountain visibility, November for almost the same weather with fewer people. March and April are the second season, warmer and hazier, with the rhododendron bloom as compensation.
What is the worst time to visit Nepal?
June to August for most of the country: heavy rain, no mountain views, landslides on the roads. The exception is the trans-Himalayan north, where those are the best months. Late May is also hard, being both hot and hazy.
How hot does the Tarai get?
Uncomfortably, from April to June, with the peak in May before the monsoon breaks. Days are long and there is little shade outside the forest. Winter is the sensible season for the plains, though thick morning fog can hold up road and air travel.
When can you see the mountains most clearly?
October to December. The monsoon scrubs the air and the winter keeps it clean, so visibility is at its best from around the start of October until the spring dust arrives in late February.
Is it cold in Nepal in winter?
It depends entirely on altitude. The Tarai stays mild, the middle hills get frost at night and sun by day, and above 3,000 metres it is properly cold with snow on the passes. Indoor heating is rare everywhere, which makes the evenings feel colder than the figures suggest.