Climate averages 1991–2020
Nagasaki weather
in July.
A warm, very wet month: the 2nd warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Nagasaki: daytime highs average 27.4°C and nights cool to about 24.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 346 mm of rain on roughly 17 days, which makes July a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 05 min on an average July day.
The nearest other city in this atlas is Isahaya (18 km away). In July its highs average 27.5°C, about as warm as Nagasaki, with 346 mm of rain.
Among the 303 cities listed in Japan, Nagasaki ranks joint 217th of 303 for the warmest July highs and joint 296th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Nagasaki is 0.4°C cooler than that mean.
From July to August, average highs rise by 1.6°C to 29.1°C, and monthly rainfall falls from 346 mm to 185 mm.
The annual picture
July 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 | 24.1°C20.4°C | 20.4°C | 444 | 16.5 | 14.314 h |
| July, selected | 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
July in nearby cities
- Isahaya in JulyJapan · 18 kmHigh 27.5°C · Low 23.6°C · 346 mm rain
- Ōmura in JulyJapan · 20 kmHigh 28.4°C · Low 24.4°C · 309 mm rain
- Amakusa in JulyJapan · 43 kmHigh 29.3°C · Low 24.0°C · 366 mm rain
- Sasebo in JulyJapan · 49 kmHigh 28.6°C · Low 24.1°C · 285 mm rain
- Ōmuta in JulyJapan · 62 kmHigh 28.8°C · Low 23.3°C · 330 mm rain
- Saga in JulyJapan · 66 kmHigh 29.0°C · Low 23.0°C · 309 mm rain
- Honmachi in JulyJapan · 72 kmHigh 29.5°C · Low 23.9°C · 347 mm rain
- Kumamoto in JulyJapan · 76 kmHigh 29.0°C · Low 23.2°C · 301 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.