Nagasaki weather in April
April in Nagasaki: nice, soaked, with muggy air — fine if you can take 12 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#3 of 12 months in Nagasaki · #634 of 1413 destinations to visit in April · comfort 80/100 (tier A)
- Days
- 21°C
- Nights
- 12°C
- Wet days
- 12
- Sun
- 8.5 h
- Humidity
- 76%
- Daylight
- 13 h
Traveller notes on Nagasaki in April
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.
Other months in Nagasaki
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.
Add your own note from Nagasaki's card on the map.
Nagasaki climate normals — April
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Nagasaki in April
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.
Peak crowdsGolden Week, Spring break (haruyasumi) in Japan, school holidays in 2 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.
Best weatherFair weatherToughest weather
What's on in Nagasaki in April
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 ↗
- Holiday
Golden Week
29 Apr – 6 MayCrowdedBook earlyA run of public holidays from 29 April to 5 May when much of Japan travels at once: trains, flights and hotels fill, rates peak and popular sights are crowded. Book well ahead or come the week after. 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 April — FAQ
- Is April a good time to visit Nagasaki?
- April in Nagasaki: nice, soaked, with muggy air — fine if you can take 12 rainy days. It ranks #3 of 12 months for Nagasaki on SeasonMap's comfort score (80/100).
- What is the weather like in Nagasaki in April?
- In April, Nagasaki averages a daily high of 20.6°C and a low of 12.2°C, with about 159.6 mm of rain over roughly 11.6 rainy days.
- What is the air quality in Nagasaki in April?
- Nagasaki has a mean US Air Quality Index of about 64 in April.
Within 300 km: Fukuoka's Cherry blossom around 18 Mar – 5 Apr, and Kagoshima's Cherry blossom around 20 Mar – 5 Apr.