SeasonMapKumamoto weather in May
Japan
May in Kumamoto: warm, soaked, with muggy air — fine if you can take 13 rainy days.
#4 of 12 months in Kumamoto · #849 of 1383 destinations to visit in May · comfort 77/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kumamoto in May
No notes yet. Open Kumamoto on the map to add the first one.
Kumamoto climate normals — May
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 28°C / 82°F | |
| Sea temperature | 20°C / 67°F | 🌊 fresh |
| Rainfall | 220 mm / 8.6 in | ⛈ soaked |
| Rainy days | 13 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 13.8 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 57 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kumamoto in May
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.
Peak crowdsGolden Week, Golden Week in Japan(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 May
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 ↗
- Holiday
Golden Week
29 Apr – 5 MayCrowdedBook earlyThe week the country drives, and Kumamoto is on the road to Aso and the Kurokawa hot springs. Expect the Aso road to move at walking pace and the ryokan to have been taken in winter. 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 May — FAQ
- Is May a good time to visit Kumamoto?
- May in Kumamoto: warm, soaked, with muggy air — fine if you can take 13 rainy days. It ranks #4 of 12 months for Kumamoto on SeasonMap's comfort score (77/100).
- What is the weather like in Kumamoto in May?
- In May, Kumamoto averages a daily high of 26.2°C and a low of 15.7°C, with about 219.5 mm of rain over roughly 12.6 rainy days.
- What is the air quality in Kumamoto in May?
- Kumamoto has a mean US Air Quality Index of about 57 in May.
Other months in Kumamoto
Compare Kumamoto in May
Warmer or cooler than Kumamoto in May
Similar destinations in East Asia — May
Within 300 km: Fukuoka's Hakata Dontaku on 3–4 May, and Yakushima's Loggerhead nesting around 10 May – 10 Jul.