SeasonMapKumamoto weather in December
Japan
December in Kumamoto: cool, a little rain, with clean air — a great time to visit.
#6 of 12 months in Kumamoto · #715 of 1383 destinations to visit in December · comfort 70/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kumamoto in December
No notes yet. Open Kumamoto on the map to add the first one.
Kumamoto climate normals — December
| Daytime high | 11°C / 52°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 41°F | |
| Sea temperature | 15°C / 59°F | 🥶 cold sea |
| Rainfall | 66 mm / 2.6 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 3°C / 38°F | |
| Sunshine | 6.8 h/day | |
| Daylight | 10 h | |
| Wind | 14 km/h / 8 mph | |
| Snowfall | 1.4 cm / 0.6 in | |
| Air quality (US AQI) | 46 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kumamoto in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyWinter break (fuyuyasumi) in Japan, school holidays in 4 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kumamoto's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherKumamoto's best weather comes in April, October and November — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Kumamoto in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Mount Aso crater alerts
1 Jan – 31 DecVolcanic activityClosuresNakadake is the day trip everyone books and the one that gets cancelled: the crater rim closes without notice on gas readings or a raised alert, and has been shut for long stretches. Check before you drive out. Source ↗
Nearby, and something's on
Within 300 km of Kumamoto — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Kumamoto?
Kumamoto in December — FAQ
- Is December a good time to visit Kumamoto?
- December in Kumamoto: cool, a little rain, with clean air — a great time to visit. It ranks #6 of 12 months for Kumamoto on SeasonMap's comfort score (70/100).
- What is the weather like in Kumamoto in December?
- In December, Kumamoto averages a daily high of 11°C and a low of 5°C, with about 65.5 mm of rain over roughly 8.6 rainy days.
- What is the air quality in Kumamoto in December?
- Kumamoto has a mean US Air Quality Index of about 46 in December.
- Does it snow in Kumamoto in December?
- Kumamoto sees roughly 1.4 cm of snowfall in December.
Other months in Kumamoto
Compare Kumamoto in December
Warmer or cooler than Kumamoto in December
Similar destinations in East Asia — December
Within 300 km: Hiroshima's Oyster season around 15 Oct – 15 Mar, and Yakushima's Snow on the peaks around 15 Dec – 31 Mar.