Climate averages 1991–2020
Sasebo 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 Sasebo: daytime highs average 18.2°C and nights cool to about 11.6°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 138 mm of rain on roughly 10 days, which makes April a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 59 min on an average April day.
The nearest other city in this atlas is Ōmura (35 km away). In April its highs average 18.2°C, about as warm as Sasebo, with 150 mm of rain.
Among the 303 cities listed in Japan, Sasebo ranks joint 47th of 303 for the warmest April highs and joint 214th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Sasebo is 1.5°C warmer than that mean.
From April to May, average highs rise by 4.2°C to 22.4°C, and monthly rainfall rises from 138 mm to 149 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
Sasebo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.3°C5.1°C | 5.1°C | 60 | 8.3 | 10.210 h |
| February | 10.5°C5.3°C | 5.3°C | 75 | 8.5 | 11.011 h |
| March | 13.7°C7.7°C | 7.7°C | 118 | 10.5 | 12.012 h |
| April, selected | 18.2°C11.6°C | 11.6°C | 138 | 10.3 | 13.013 h |
| May | 22.4°C15.9°C | 15.9°C | 149 | 10.1 | 13.914 h |
| June | 25.3°C19.9°C | 19.9°C | 308 | 15.7 | 14.314 h |
| July | 28.6°C24.1°C | 24.1°C | 285 | 16.3 | 14.114 h |
| August | 30.1°C25.2°C | 25.2°C | 178 | 14.7 | 13.413 h |
| September | 27.0°C22.0°C | 22.0°C | 186 | 12.3 | 12.412 h |
| October | 22.3°C17.2°C | 17.2°C | 102 | 6.9 | 11.411 h |
| November | 17.0°C12.2°C | 12.2°C | 90 | 8.1 | 10.510 h |
| December | 11.7°C7.3°C | 7.3°C | 69 | 7.5 | 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
- Ōmura in AprilJapan · 35 kmHigh 18.2°C · Low 12.1°C · 150 mm rain
- Karatsu in AprilJapan · 38 kmHigh 18.4°C · Low 11.0°C · 134 mm rain
- Isahaya in AprilJapan · 47 kmHigh 17.4°C · Low 11.6°C · 167 mm rain
- Nagasaki in AprilJapan · 49 kmHigh 17.4°C · Low 12.6°C · 167 mm rain
- Saga in AprilJapan · 54 kmHigh 18.7°C · Low 9.7°C · 145 mm rain
- Itoshima in AprilJapan · 60 kmHigh 17.9°C · Low 10.7°C · 126 mm rain
- Maebaru-chūō in AprilJapan · 62 kmHigh 17.4°C · Low 10.9°C · 126 mm rain
- Ōmuta in AprilJapan · 69 kmHigh 18.7°C · Low 10.4°C · 145 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 Sasebo) is explained once on the Sasebo year overview and on the Sources, method and limits page.