Ko Chang weather in September
September in Ko Chang: warm, soaked, with clean air — a gamble, with 29 rainy days.
#12 of 12 months in Ko Chang · #818 of 897 destinations to visit in September · comfort 57/100 (tier D)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ko Chang in September
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Ko Chang climate normals — September
| Daytime high | 29°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Rainfall | 548 mm / 21.6 in | ⛈ soaked |
| Rainy days | 29 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 25°C / 76°F | |
| Sunshine | 6.1 h/day | |
| Daylight | 12.2 h | |
| Wind | 10 km/h / 6 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ko Chang in September — FAQ
- Is September a good time to visit Ko Chang?
- September in Ko Chang: warm, soaked, with clean air — a gamble, with 29 rainy days. It ranks #12 of 12 months for Ko Chang on SeasonMap's comfort score (57/100).
- What is the weather like in Ko Chang in September?
- In September, Ko Chang averages a daily high of 28.6°C and a low of 25.2°C, with about 548 mm of rain over roughly 29.4 rainy days.
- What is the air quality in Ko Chang in September?
- Ko Chang has a mean US Air Quality Index of about 34 in September.