Best Time to Visit Kathmandu (Nepal)
I have flown into Kathmandu at every time of year, and I can tell you the city never looks the same twice. Some visits I landed in crisp, sunny October air with the Himalayas glowing on the horizon. Others I arrived into the tail of the monsoon, grey and dripping. The valley rewards planning, so this is the guide I wish someone had handed me before my first trip.
The Short Answer
For most travellers, October and November are the best months to visit Kathmandu. The monsoon has washed the sky clean, temperatures sit between 15 and 24 degrees Celsius, and the mountains are at their most visible. March to May runs a close second, offering warm days and blooming rhododendrons. June to September brings heavy rain, and December to February turns the valley cold and hazy.
Autumn: October and November
October is simply Kathmandu at its finest. I have stood at Boudhanath stupa after the rains and watched the prayer flags snap against a sky so clear it hurt. The humidity of the monsoon has cleared, views of the peaks are outstanding, and days are warm enough for a light jacket at night. November stays dry and slightly cooler, which makes it ideal for longer treks.
Spring: March to May
Spring is my second pick. Temperatures climb from a pleasant March into a warm May, and the lower hills erupt with rhododendrons in full bloom. The city feels alive with energy and colour. By late April and May the heat builds and the first monsoon clouds roll in, so I plan most outdoor time for March and early April.
Summer and Monsoon: June to September
I will be honest: this is my least favourite season in the valley. The monsoon runs from June to around mid-September, bringing daily downpours, humidity, and the occasional landslide that can close roads out of town. Flights within Nepal get delayed as clouds pile over the mountains. That said, the city turns lush and quiet, and rooms drop in price. If your budget matters more than the weather, this window can work. I still avoid hiking the big trails then, because leeches and mud make things miserable.
Winter: December to February
Winter is cold but far from ruinous. Days stay sunny and in the low teens, while nights can drop near freezing in the city and well below on high passes. I find the mornings crisp and the crowds thin, which makes sightseeing at Swayambhunath genuinely pleasant. Just pack warm layers and expect occasional morning fog that can delay flights.
Trekking and Climbing Seasons
The trekking calendar matters just as much as the weather in the city. The two golden windows for the Annapurnas, the Everest region, and Langtang are the same as the ones I recommended above: October to November and March to April. These months bring stable skies, moderate temperatures at altitude, and the best mountain views.
For mountaineering, the big climbing seasons are spring and autumn, when expeditions target peaks like Ama Dablam and the 8000-metre giants. Spring, around April and May, offers warmer nights; autumn is drier. In winter, high passes can be snowbound and dangerously cold, and in the summer monsoon I would only consider lower-altitude or rain shadow treks such as parts of Upper Mustang, which stay dry behind the range.
Festivals Worth Timing For
Festivals are part of why I love this city, and several are worth planning around. Dashain, in September or October, is the biggest festival of the year; the city empties as families return home, so I expect some shops and services to close. Tihar, the festival of lights, follows a couple of weeks later in October or November, when evenings fill with oil lamps and marigold garlands.
Holi arrives in late February or March, turning Kathmandu into a riot of coloured powder and water, great fun if you enjoy chaos. Indra Jatra in September is a highlight for classic Newari culture, with the kumari chariot procession through the old city. If you can line a visit up with Dashain and Tihar, you will see Nepal at its most festive.
When I Would Tell You to Go
If you can only make one journey, book October. The weather and visibility are at their peak, and autumn festivals add a layer of celebration you will not find in summer. If your dates land elsewhere, spring beats every remaining option, and winter still rewards the light traveller ready for cold, quiet mornings around the old temples. I also advise booking lodges and domestic flights well ahead during the two main windows, because the trails fill up fast once the season is right. For me, the best time to visit Kathmandu comes down to one simple rule: arrive in the clear season, arrive for a festival, and the city will do the rest.
