SeasonMapKagoshima weather in September
Japan
September in Kagoshima: sweltering, soaked, with muggy air — a gamble, with 17 rainy days.
#9 of 12 months in Kagoshima · #1190 of 1383 destinations to visit in September · comfort 55/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Kagoshima in September
Other months in Kagoshima
Kagoshima's forum calls Kyushu genuinely warmer than the rest of Japan in October and November, warm early in the month cooling toward the end. Regulars flag October as still within typhoon season, occasionally bringing a day or two of heavy rain before conditions return to normal, and recommend a light jacket for the cooler evenings that develop later in the month.
Add your own note from Kagoshima's card on the map.
Kagoshima climate normals — September
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 29°C / 84°F | ♨️ bath-warm |
| Rainfall | 218 mm / 8.6 in | ⛈ soaked |
| Rainy days | 17 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 22°C / 72°F | |
| Sunshine | 8.7 h/day | |
| Daylight | 12.4 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 58 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Kagoshima in September
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.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Kagoshima'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 weatherKagoshima's best weather comes in April, October and November — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Kagoshima in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Sakurajima ashfall
15 May – 30 Sep · usuallyDust seasonThe volcano across the bay erupts most weeks of the year, but it is in summer that the wind carries the ash over the city. Umbrellas go up on a clear day and the council hands out yellow ash bags. Source ↗
- Hazard
Typhoon season
15 Jul – 30 Sep · usuallyClosuresMore systems make landfall around here than anywhere else in the country. The Sakurajima ferry and the boats to Yakushima stop a day before the storm arrives. Source ↗
Where is Kagoshima?
Kagoshima in September — FAQ
- Is September a good time to visit Kagoshima?
- September in Kagoshima: sweltering, soaked, with muggy air — a gamble, with 17 rainy days. It ranks #9 of 12 months for Kagoshima on SeasonMap's comfort score (55/100).
- What is the weather like in Kagoshima in September?
- In September, Kagoshima averages a daily high of 30.8°C and a low of 24.1°C, with about 218.3 mm of rain over roughly 17.3 rainy days.
- What is the air quality in Kagoshima in September?
- Kagoshima has a mean US Air Quality Index of about 58 in September.