Climate averages 1991–2020
Nagasaki weather
in April.
A mild, wet month: the 7th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Nagasaki: daytime highs average 17.4°C and nights cool to about 12.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 167 mm of rain on roughly 11 days, which makes April a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 58 min on an average April day.
The nearest other city in this atlas is Isahaya (18 km away). In April its highs average 17.4°C, about as warm as Nagasaki, with 167 mm of rain.
Among the 303 cities listed in Japan, Nagasaki ranks joint 146th of 303 for the warmest April highs and joint 277th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Nagasaki is 0.7°C warmer than that mean.
From April to May, average highs rise by 3.8°C to 21.2°C, and monthly rainfall rises from 167 mm to 197 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Isahaya in AprilJapan · 18 kmHigh 17.4°C · Low 11.6°C · 167 mm rain
- Ōmura in AprilJapan · 20 kmHigh 18.2°C · Low 12.1°C · 150 mm rain
- Amakusa in AprilJapan · 43 kmHigh 19.2°C · Low 12.0°C · 152 mm rain
- Sasebo in AprilJapan · 49 kmHigh 18.2°C · Low 11.6°C · 138 mm rain
- Ōmuta in AprilJapan · 62 kmHigh 18.7°C · Low 10.4°C · 145 mm rain
- Saga in AprilJapan · 66 kmHigh 18.7°C · Low 9.7°C · 145 mm rain
- Honmachi in AprilJapan · 72 kmHigh 19.5°C · Low 11.4°C · 151 mm rain
- Kumamoto in AprilJapan · 76 kmHigh 18.8°C · Low 10.5°C · 154 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.