SeasonMapKumamoto weather in October
Japan
October in Kumamoto: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Kumamoto · #158 of 1383 destinations to visit in October · comfort 90/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kumamoto in October
Notes from nearby Nagasaki (76 km away)
Kumamoto doesn't have its own notes for October yet — these are about Nagasaki, close enough to share the season.
October is widely rated one of Japan's two best months, and Kyushu — Nagasaki, Fukuoka, Kumamoto, Kagoshima — is the part of the country the forum points at when someone wants October warmth specifically. Nagasaki bears that out: days near 23°C and nights that stay unusually mild at about 18, well above what Honshu offers by then, with the sea still at 25°C. Early October runs warm and late October cools, so a light jacket for the evening covers it. The one risk worth planning around is typhoons, which can deliver a day or two of heavy rain before things return to normal.
Add your own note from Kumamoto's card on the map.
Kumamoto climate normals — October
| Daytime high | 23°C / 73°F | 😎 nice |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Sea temperature | 24°C / 74°F | 🙂 pleasant |
| Rainfall | 66 mm / 2.6 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 14°C / 56°F | |
| Sunshine | 8.5 h/day | |
| Daylight | 11.4 h | |
| Wind | 12 km/h / 7 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kumamoto in October
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.
Busyschool holidays in 3 of the markets that fill it, one of its best months for weather(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).
Best 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 October
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 October — FAQ
- Is October a good time to visit Kumamoto?
- October in Kumamoto: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Kumamoto on SeasonMap's comfort score (90/100).
- What is the weather like in Kumamoto in October?
- In October, Kumamoto averages a daily high of 22.8°C and a low of 15.5°C, with about 66.1 mm of rain over roughly 7 rainy days.
- What is the air quality in Kumamoto in October?
- Kumamoto has a mean US Air Quality Index of about 42 in October.
Other months in Kumamoto
Compare Kumamoto in October
Warmer or cooler than Kumamoto in October
Similar destinations in East Asia — October
Within 300 km: Hiroshima's Oyster season around 15 Oct – 15 Mar, and Busan's Busan International Film Festival on 6–15 Oct.