What is the weather like in Chiang Mai vs Ko Phi Phi in September?

In September, Chiang Mai averages 33°C high / 24°C low with about 232 mm of rain; Ko Phi Phi averages 28°C high / 26°C low with about 309 mm.

Chiang Mai vs Ko Phi Phi in September

Ko Phi Phi is the better pick in September — 60 vs 49 on SeasonMap's comfort score. Ko Phi Phi is hot, soaked, clean air, while Chiang Mai is sweltering, soaked, muggy air.

Chiang Mai vs Ko Phi Phi — September climate, side by side

	Chiang Mai	Ko Phi Phi
Comfort score	49/100 (F)	60/100 (C)
Feels-like high	39°C	32°C
Avg high / low	33° / 24°	28° / 26°
Rainfall	232 mm	309 mm
Rainy days	23	24
Humidity	86%	82%
Air quality (AQI)	53	32

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

Chiang Mai vs Ko Phi Phi in September — FAQ

Is September better in Chiang Mai or Ko Phi Phi?: Ko Phi Phi is the better pick in September — 60 vs 49 on SeasonMap's comfort score. Ko Phi Phi is hot, soaked, clean air, while Chiang Mai is sweltering, soaked, muggy air.
What is the weather like in Chiang Mai vs Ko Phi Phi in September?: In September, Chiang Mai averages 33°C high / 24°C low with about 232 mm of rain; Ko Phi Phi averages 28°C high / 26°C low with about 309 mm.