Nagasaki weather in October
October in Nagasaki: warm, rainy, with clean air — one of the best months to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#1 of 12 months in Nagasaki · #332 of 1413 destinations to visit in October · comfort 85/100 (tier A)
- Days
- 25°C
- Nights
- 17°C
- Wet days
- 9
- Sun
- 8.2 h
- Humidity
- 73%
- Daylight
- 11 h
Traveller notes on Nagasaki in October
October is widely rated one of Japan's two best months, and Kyushu — Nagasaki, Fukuoka, Kumamoto, Kagoshima — is the part of the country the forum points at when someone wants October warmth specifically. Nagasaki bears that out: days near 23°C and nights that stay unusually mild at about 18, well above what Honshu offers by then, with the sea still at 25°C. Early October runs warm and late October cools, so a light jacket for the evening covers it. The one risk worth planning around is typhoons, which can deliver a day or two of heavy rain before things return to normal.
Other months in Nagasaki
Forum posters consistently rate April as one of the best months to visit Japan, generally warm and springlike, though posters are direct that conditions can still turn variable enough to want a coat on some days, whether from cooler temperatures or rain. Posters describe typical April days as comfortable in shirtsleeves with a light jacket in the daypack for evenings, rather than requiring a heavy winter coat, and note that on a sunny day temperatures can climb into the mid-20sC. Posters discussing Kyushu specifically, where Nagasaki sits, describe the region as reliably warm by late March into April compared with much of the rest of Japan. Posters generally rate April as a comfortable, mild time to visit Nagasaki, with a light jacket the main packing recommendation for cooler mornings and evenings.
Add your own note from Nagasaki's card on the map.
Nagasaki climate normals — October
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Nagasaki in October
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyNagasaki Kunchi, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Nagasaki's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherNagasaki's best weather comes in April, October and November — separate windows, not one continuous season.
October includes Nagasaki Kunchi.
Best weatherFair weatherToughest weather
What's on in Nagasaki in October
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Rule
Gunkanjima landings are weather-called
1 Jan – 31 DecClosuresBoats to Hashima sail most days but only land when the swell allows, and the call is made at the pier. Winter is when it fails most; leave a spare day if the island is the reason you came. Source ↗
- Hazard
Typhoon season
1 Aug – 5 Oct · usuallyClosuresThe west coast of Kyushu is on the busiest approach in Japan. The Goto and Gunkanjima boats stop first and the trains follow; the mainland connection is the slowest thing to come back. Source ↗
- Festival
Nagasaki Kunchi
7–9 OctReligious feastCrowdedBook earlyThree fixed days at Suwa Shrine since 1634, with the Chinese and Dutch borrowings that no other Japanese festival has. Seated tickets are balloted and hotels go months ahead. Source ↗
Nearby, and something's on
Within 300 km of Nagasaki — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Nagasaki?
Nagasaki in October — FAQ
- Is October a good time to visit Nagasaki?
- October in Nagasaki: warm, rainy, with clean air — one of the best months to visit. It ranks #1 of 12 months for Nagasaki on SeasonMap's comfort score (85/100).
- What is the weather like in Nagasaki in October?
- In October, Nagasaki averages a daily high of 24.6°C and a low of 16.8°C, with about 107.4 mm of rain over roughly 9 rainy days.
- What is the air quality in Nagasaki in October?
- Nagasaki has a mean US Air Quality Index of about 43 in October.
Within 300 km: Kagoshima's Myoenji Mairi on 24–25 Oct, and Busan's Busan International Film Festival on 6–15 Oct.