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

In September, Ko Phi Phi averages 28°C high / 26°C low with about 309 mm of rain; Ko Samui averages 32°C high / 25°C low with about 141 mm.

Ko Phi Phi vs Ko Samui in September

Ko Samui is the better pick in September — 73 vs 60 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Ko Phi Phi is hot, soaked, clean air.

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

	🇹🇭 Ko Phi Phi	🇹🇭 Ko Samui
Comfort score	60/100 (C)	73/100 (B)
Feels-like high	32°C	37°C
Avg high / low	28° / 26°	32° / 25°
Rainfall	309 mm	141 mm
Rainy days	24	22
Humidity	82%	79%
Air quality (AQI)	32	27

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

Month by month

Ko Phi Phi vs Ko Samui in September — FAQ

Is September better in Ko Phi Phi or Ko Samui?: Ko Samui is the better pick in September — 73 vs 60 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Ko Phi Phi is hot, soaked, clean air.
What is the weather like in Ko Phi Phi vs Ko Samui in September?: In September, Ko Phi Phi averages 28°C high / 26°C low with about 309 mm of rain; Ko Samui averages 32°C high / 25°C low with about 141 mm.