Kumamoto weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Fair
Best time to visit: April – May, September – November
What is the weather like in Kumamoto in December?
In December, Kumamoto is cool: daytime highs average 11 °C, and nights cool down to about 5 °C. The sea averages 16.3 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain falls on about 8 days, adding up to 66 mm. All in all, December is a so-so month for a holiday in Kumamoto.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 72 | 42 | 29 |
| Day | 17° | 11° | 9° |
| Night | 10° | 5° | 3° |
| Sea | 20° | 16° | 14° |
| Sun | 5 h | 4 h | 4 h |
| Rain days | 8 | 8 | 8 |
More details for December
- Daylight
- 10 h 1 min07:12 – 17:13
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 15 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %33 %
- Sunshineweight 20 %15 %
- Few rainy daysweight 30 %74 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- A jumper for the evenings
Kumamoto in December: quick answers
Is Kumamoto hot in December?
No. In December, Kumamoto is cool: daytime highs average 11 °C and nights drop to about 5 °C.
Can you swim in Kumamoto in December?
Only if you don't mind cold water: in December the sea averages just 16.3 °C. Comfortable swimming is possible from June to October.
Does it rain much in Kumamoto in December?
Rain falls on about 8 days, adding up to 66 mm.
Kumamoto month by month
The whole year in KumamotoAll destinations: JapanWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences