Nagasaki weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Fair
Best time to visit: April – May, September – November
What is the weather like in Nagasaki in June?
In June, Nagasaki is warm: daytime highs average 24 °C, and even at night it stays warm at around 21 °C. The sea averages 22.6 °C – refreshing for a swim. Expect around 4 hours of sunshine a day. It rains often – on about 16 days, adding up to 419 mm. The air is often humid and muggy. All in all, June is a so-so month for a holiday in Nagasaki.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 14 h 18 min05:12 – 19:29
- UV index
- 11 · extremeclear sky, noon (estimate)All months
- Muggy days
- 25 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 78 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %20 %
- Few rainy daysweight 30 %14 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in June
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Rain jacket or umbrella
Nagasaki in June: quick answers
Is Nagasaki hot in June?
Warm rather than hot: in June, daytime highs in Nagasaki average 24 °C and nights cool to about 21 °C.
Can you swim in Nagasaki in June?
Yes. In June the sea averages 22.6 °C – refreshing for a swim.
Does it rain much in Nagasaki in June?
It rains often – on about 16 days, adding up to 419 mm.
Nagasaki month by month
The whole year in NagasakiAll destinations: JapanWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences