What is the weather like in Ko Chang vs Ko Samui in September?

In September, Ko Chang averages 30°C high / 27°C low with about 523 mm of rain; Ko Samui averages 32°C high / 25°C low with about 141 mm.

Ko Chang vs Ko Samui in September

Ko Samui is the better pick in September — 73 vs 49 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Ko Chang is sweltering, soaked, clean air.

Ko Chang vs Ko Samui — September climate, side by side

	🇹🇭 Ko Chang	🇹🇭 Ko Samui
Comfort score	49/100 (F)	73/100 (B)
Feels-like high	37°C	37°C
Avg high / low	30° / 27°	32° / 25°
Rainfall	523 mm	141 mm
Rainy days	30	22
Humidity	87%	79%
Air quality (AQI)	34	27

Monthly climate normals (ERA5 reanalysis). Comfort scores are SeasonMap estimates.

Month by month

Ko Chang vs Ko Samui in September — FAQ

Is September better in Ko Chang or Ko Samui?: Ko Samui is the better pick in September — 73 vs 49 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Ko Chang is sweltering, soaked, clean air.
What is the weather like in Ko Chang vs Ko Samui in September?: In September, Ko Chang averages 30°C high / 27°C low with about 523 mm of rain; Ko Samui averages 32°C high / 25°C low with about 141 mm.