When to Go to Nepal

Choose your season by trail logic

If your trip depends on…	Best window	Do not force	Nomad’s Land note
Classic trekking visibility	October to November	Expecting solitude on the most famous trails	Post-monsoon clarity is excellent; popularity is part of the season.
Spring trekking and rhododendrons	March to May	Assuming views are always as clear as autumn	Spring is warmer and lively, but haze and pre-monsoon build-up can affect visibility.
High passes	Late spring or autumn, depending on route	Winter crossings without specialist planning	Snow and altitude set the rules, not the itinerary title.
Monsoon travel	June to September, only for selected routes	Classic wet-side trekking as if rain is only an inconvenience	Rain-shadow areas may work; landslides, leeches, clouds and transport disruption matter elsewhere.
Terai wildlife and lowerland travel	November to March	Peak heat and heavy monsoon conditions	Nepal is more than the Himalaya; lowland season has a different logic.

The thing most travelers get wrong

They think “Nepal weather” means Himalayan views. But a Nepal journey may begin with humid city heat, climb through wet hills, sleep in cold lodges, cross windy passes and end in subtropical lowlands. The best season is the one that matches the vertical journey, not the postcard.

When not to go, unless you know why

June to September for classic trekking routes: rain, cloud, landslides and transport disruption can dominate unless the route is chosen carefully.
Deep winter for high passes: possible only for experienced travelers with proper local support and flexibility.
October with no booking margin: the best visibility season is also a busy season.
April and May if you need perfect mountain clarity every day: warmer does not always mean clearer.

Season by season: what changes on the ground

Spring: March to May

Spring is warm, active and strong for trekking. Rhododendrons color mid-hill routes, high trails open progressively, and lodges are alive. Visibility can be less crisp than autumn, especially later in the season.

Summer and monsoon: June to September

Monsoon is not simply “bad weather.” It is a route filter. Some rain-shadow areas can work; many classic routes become wetter, cloudier and more vulnerable to landslides or transport delays.

Autumn: October to November

Autumn is the classic Nepal answer for a reason: clearer skies after the rains, strong trekking conditions and excellent visibility. It is also the moment when famous routes are most visibly famous.

Winter: December to February

Winter brings clear air and fewer people on lower and mid-altitude routes, but cold nights and snow risk at altitude. It rewards selected itineraries and punishes lazy assumptions about high passes.

How season changes the route

Everest and Annapurna classics: strongest in autumn and spring, with crowd and booking strategy part of the plan.
Mustang and rain-shadow areas: can be more realistic during monsoon than wet-side routes, but access still needs checking.
Terai and wildlife extensions: cooler months often work better than hot or monsoon periods.
High-pass treks: never plan from a calendar alone; snow and acclimatization decide.

Weather reference: Kathmandu is not the trek

Kathmandu data helps with arrival and valley planning. It does not tell you what happens at 3,500 meters, on a pass, in the Terai, or inside a monsoon-affected road day.

Kathmandu weather averages, 2013–2023 reference data
Month	Average High (°C)	Average Low (°C)	Precipitation (mm)	Sunny Days	Partly Cloudy Days	Overcast Days
January	19	2	15	25	4	2
February	21	4	18	22	6	1
March	25	8	30	25	4	2
April	30	12	50	20	8	2
May	30	17	100	15	10	6
June	30	20	225	5	10	15
July	29	21	375	3	8	20
August	29	21	360	3	8	20
September	29	19	175	10	10	10
October	28	13	50	25	5	1
November	23	8	8	28	2	0
December	20	4	10	27	3	1

Source supplied in existing content: Time and Date, Kathmandu, 2013–2023. Use as a city anchor only; verify against the canonical weather source before production publication.