Koror weather in September
September in Koror: sweltering, soaked, with clean air — a great time to visit.
#4 of 12 months in Koror · #422 of 604 destinations to visit in September · comfort 70/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Koror climate normals — September
| Daytime high | 28°C / 83°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Feels like (high) | 34°C / 93°F | |
| Rainfall | 289 mm / 11.4 in | ⛈ soaked |
| Rainy days | 23 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 9.3 h/day | |
| Daylight | 12.2 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Koror?
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Koror in September — FAQ
- Is September a good time to visit Koror?
- September in Koror: sweltering, soaked, with clean air — a great time to visit. It ranks #4 of 12 months for Koror on SeasonMap's comfort score (70/100).
- What is the weather like in Koror in September?
- In September, Koror averages a daily high of 28.4°C and a low of 26.1°C, with about 289 mm of rain over roughly 23.4 rainy days.
- What is the air quality in Koror in September?
- Koror has a mean US Air Quality Index of about 30 in September.