Kathmandu from Seattle

11,212 km, about 14h 35m in the air. Every month scored for the weather at Kathmandu and for the holidays that crowd it out at both ends.

Go in Jan–Apr — these months score within a whisker of each other; 19C max, 3 rainy days. Dec is the next best.

Search flights SEA → KTM · 12–19 Feb 2027 Where to stay Kathmandu · 12–19 Feb 2027 Things to do tours and tickets in Kathmandu

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Public holidays at Seattle move this destination's year too little to make it a different answer, so the Kathmandu page is the one of record. This one is kept for the distance and the flight it implies.

No fare history on SEA–KTM yet, so this ranking is climate and crowds only. The price column fills in as the scanner collects.

Month by month from Seattle

Month	Max °C	Rain days	Crowds	Verdict	Why
Jan	17°	3d	80	sweet spot	17C max, 3 rainy days
Feb	19°	3d	85	sweet spot	19C max, 3 rainy days
Mar	22°	9d	85	sweet spot	22C max, 9 rainy days
Apr	25°	11d	85	sweet spot	25C max, 11 rainy days
May	25°	21d	65	avoid	monsoon: 21 rainy days, 236mm
Jun	27°	25d	65	avoid	monsoon: 25 rainy days, 441mm
Jul	26°	30d	100	avoid	monsoon: 30 rainy days, 882mm
Aug	26°	30d	100	avoid	monsoon: 30 rainy days, 750mm
Sep	26°	25d	100	avoid	monsoon: 25 rainy days, 433mm
Oct	24°	9d	45	okbusy	peak: The autumn season brings clear skies and moderate temperatures…
Nov	21°	1d	45	okbusy	peak: The autumn season brings clear skies and moderate temperatures…
Dec	18°	1d	65	goodbusy	shoulder season

Crowds is a score out of 100 where higher is quieter. It counts public-holiday clusters in US as well as at Kathmandu, which is why this table differs from the same one read from another country. A busy month is a crowded one, not a bad one — usually it is crowded because the weather is good. Crowds alone never make a month “avoid”: that is reserved for weather worth skipping.

The year in Kathmandu

Kathmandu experiences a distinctive dry season in winter (December to February) and a severe monsoon from June to September. Visitors should plan accordingly, as heavy rainfall can disrupt travel plans.

Busiest	early May to mid Jun — This period marks the spring season where temperatures are warm and rain is beginning, attracting many tourists. early Oct to mid Nov — The autumn season brings clear skies and moderate temperatures, making it ideal for trekking and outdoor activities.
Quieter, still good	mid Feb to late Apr — These months provide mild weather and lesser crowds compared to peak season. mid Nov to late Dec — Post-peak season offers good weather with few tourists and lower prices.
Wet or stormy	mid Jun to late Sep — monsoon, severe
Watch out for	haze; wildfire season in dry months

This section was written by a language model from the climate figures above, and nobody has checked it. The month-by-month table is measured — ten years of ERA5 readings and published holiday calendars — and where the two disagree, the table is the one to believe. The busiest and quieter periods here also count toward the crowd score, which is 20% of the ranking.

Get fare alerts from Seattle On Telegram, when a fare from SEA is worth telling you about. Not more than that, and /stop ends it.

The rest of the trip

Kathmandu from anywhere · everywhere from Seattle

Some links above are affiliate links: if you book through one, we may earn a commission at no extra cost to you. It does not affect the scores on this page, which are computed from climate, holiday and fare data before any link is built.