Nagasaki weather in June
June in Nagasaki: hot, soaked, with muggy air — a gamble, with 15 rainy days.
Updated September 2026 · climate normals from ERA5 reanalysis
#10 of 12 months in Nagasaki · #1160 of 1413 destinations to visit in June · comfort 57/100 (tier D)
- Days
- 27°C
- Nights
- 21°C
- Wet days
- 15
- Sun
- 7.4 h
- Humidity
- 87%
- Daylight
- 14 h
Traveller notes on Nagasaki in June
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.
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 — June
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Nagasaki in June
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.
Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(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).
Toughest 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 June
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 ↗
- Season
Tsuyu rain season
1 Jun – 20 Jul · usuallyMonsoonRiskNagasaki takes the heaviest rain-front totals in Kyushu and the city is built up the sides of a bowl, so the warnings are about the hillsides rather than the streets. The hydrangeas are the compensation.
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 June — FAQ
- Is June a good time to visit Nagasaki?
- June in Nagasaki: hot, soaked, with muggy air — a gamble, with 15 rainy days. It ranks #10 of 12 months for Nagasaki on SeasonMap's comfort score (57/100).
- What is the weather like in Nagasaki in June?
- In June, Nagasaki averages a daily high of 27.1°C and a low of 20.6°C, with about 380.8 mm of rain over roughly 15 rainy days.
- What is the air quality in Nagasaki in June?
- Nagasaki has a mean US Air Quality Index of about 63 in June.
Within 300 km: Yakushima's Loggerhead nesting around 10 May – 10 Jul.