Ishigaki weather in September
September in Ishigaki: warm, soaked, with clean air — fine if you can take 16 rainy days.
#9 of 12 months in Ishigaki · #663 of 897 destinations to visit in September · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
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Ishigaki climate normals — September
| Daytime high | 29°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Rainfall | 289 mm / 11.4 in | ⛈ soaked |
| Rainy days | 16 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.3 h | |
| Wind | 31 km/h / 19 mph | |
| Air quality (US AQI) | 32 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ishigaki in September — FAQ
- Is September a good time to visit Ishigaki?
- September in Ishigaki: warm, soaked, with clean air — fine if you can take 16 rainy days. It ranks #9 of 12 months for Ishigaki on SeasonMap's comfort score (70/100).
- What is the weather like in Ishigaki in September?
- In September, Ishigaki averages a daily high of 28.6°C and a low of 26.8°C, with about 288.9 mm of rain over roughly 15.8 rainy days.
- What is the air quality in Ishigaki in September?
- Ishigaki has a mean US Air Quality Index of about 32 in September.