Climate averages 1991–2020
Kumamoto weather
in April.
A mild, wet month: the 7th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Kumamoto: daytime highs average 18.8°C and nights cool to about 10.5°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 154 mm of rain on roughly 12 days, which makes April a wet month (the 8th 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 Ōmuta (34 km away). In April its highs average 18.7°C, about as warm as Kumamoto, with 145 mm of rain.
Among the 303 cities listed in Japan, Kumamoto ranks joint 23rd of 303 for the warmest April highs and 267th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Kumamoto is 2.1°C warmer than that mean.
From April to May, average highs rise by 4.4°C to 23.2°C, and monthly rainfall rises from 154 mm to 178 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
Kumamoto climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.0°C3.0°C | 3.0°C | 78 | 10.6 | 10.310 h |
| February | 10.5°C3.4°C | 3.4°C | 99 | 10.4 | 11.011 h |
| March | 14.0°C6.1°C | 6.1°C | 142 | 13.0 | 12.012 h |
| April, selected | 18.8°C10.5°C | 10.5°C | 154 | 12.1 | 13.013 h |
| May | 23.2°C15.2°C | 15.2°C | 178 | 11.9 | 13.814 h |
| June | 25.7°C19.4°C | 19.4°C | 403 | 17.0 | 14.314 h |
| July | 29.0°C23.2°C | 23.2°C | 301 | 16.2 | 14.114 h |
| August | 30.4°C24.0°C | 24.0°C | 135 | 13.0 | 13.413 h |
| September | 27.5°C20.8°C | 20.8°C | 156 | 11.7 | 12.412 h |
| October | 22.5°C15.1°C | 15.1°C | 98 | 8.3 | 11.411 h |
| November | 16.9°C9.7°C | 9.7°C | 92 | 8.8 | 10.511 h |
| December | 11.2°C4.9°C | 4.9°C | 84 | 10.0 | 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
- Ōmuta in AprilJapan · 34 kmHigh 18.7°C · Low 10.4°C · 145 mm rain
- Honmachi in AprilJapan · 35 kmHigh 19.5°C · Low 11.4°C · 151 mm rain
- Kurume in AprilJapan · 59 kmHigh 19.2°C · Low 8.9°C · 147 mm rain
- Saga in AprilJapan · 60 kmHigh 18.7°C · Low 9.7°C · 145 mm rain
- Amakusa in AprilJapan · 61 kmHigh 19.2°C · Low 12.0°C · 152 mm rain
- Isahaya in AprilJapan · 61 kmHigh 17.4°C · Low 11.6°C · 167 mm rain
- Tosu in AprilJapan · 64 kmHigh 19.1°C · Low 8.7°C · 147 mm rain
- Ōmura in AprilJapan · 70 kmHigh 18.2°C · Low 12.1°C · 150 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 Kumamoto) is explained once on the Kumamoto year overview and on the Sources, method and limits page.