Climate averages 1991–2020
Nagasaki weather
in June.
A warm, very wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Nagasaki: daytime highs average 24.1°C and nights cool to about 20.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 444 mm of rain on roughly 17 days, which makes June a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 16 min on an average June day.
The nearest other city in this atlas is Isahaya (18 km away). In June its highs average 24.0°C, about as warm as Nagasaki, with 444 mm of rain.
Among the 303 cities listed in Japan, Nagasaki ranks joint 197th of 303 for the warmest June highs and joint 295th of 303 for the driest June (rainfall, lowest first). The mean June high of those 303 cities is 24.4°C; Nagasaki is 0.3°C cooler than that mean.
From June to July, average highs rise by 3.4°C to 27.4°C, and monthly rainfall falls from 444 mm to 346 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Nagasaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.8°C6.3°C | 6.3°C | 79 | 10.9 | 10.310 h |
| February | 10.7°C6.5°C | 6.5°C | 100 | 10.2 | 11.011 h |
| March | 13.5°C8.9°C | 8.9°C | 149 | 12.0 | 12.012 h |
| April | 17.4°C12.6°C | 12.6°C | 167 | 11.4 | 13.013 h |
| May | 21.2°C16.7°C | 16.7°C | 197 | 10.8 | 13.814 h |
| June, selected | 24.1°C20.4°C | 20.4°C | 444 | 16.5 | 14.314 h |
| July | 27.4°C24.3°C | 24.3°C | 346 | 16.6 | 14.114 h |
| August | 29.1°C25.6°C | 25.6°C | 185 | 13.7 | 13.413 h |
| September | 26.7°C22.8°C | 22.8°C | 202 | 11.9 | 12.412 h |
| October | 22.3°C18.3°C | 18.3°C | 112 | 7.5 | 11.411 h |
| November | 17.2°C13.4°C | 13.4°C | 106 | 9.1 | 10.511 h |
| December | 12.2°C8.6°C | 8.6°C | 92 | 10.3 | 10.010 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Isahaya in JuneJapan · 18 kmHigh 24.0°C · Low 19.6°C · 444 mm rain
- Ōmura in JuneJapan · 20 kmHigh 25.0°C · Low 20.3°C · 381 mm rain
- Amakusa in JuneJapan · 43 kmHigh 25.8°C · Low 20.1°C · 445 mm rain
- Sasebo in JuneJapan · 49 kmHigh 25.3°C · Low 19.9°C · 308 mm rain
- Ōmuta in JuneJapan · 62 kmHigh 25.6°C · Low 19.3°C · 393 mm rain
- Saga in JuneJapan · 66 kmHigh 25.8°C · Low 18.9°C · 344 mm rain
- Honmachi in JuneJapan · 72 kmHigh 26.2°C · Low 20.2°C · 428 mm rain
- Kumamoto in JuneJapan · 76 kmHigh 25.7°C · Low 19.4°C · 403 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Nagasaki) is explained once on the Nagasaki year overview and on the Sources, method and limits page.
Isahaya lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.