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

In September, Chiang Mai averages 33°C high / 24°C low with about 232 mm of rain; Ko Pha Ngan averages 30°C high / 26°C low with about 180 mm.

Chiang Mai vs Ko Pha Ngan in September

Ko Pha Ngan is the better pick in September — 70 vs 49 on SeasonMap's comfort score. Ko Pha Ngan is sweltering, soaked, clean air, while Chiang Mai is sweltering, soaked, muggy air.

Chiang Mai vs Ko Pha Ngan — September climate, side by side

	🇹🇭 Chiang Mai	🇹🇭 Ko Pha Ngan
Comfort score	49/100 (F)	70/100 (B)
Feels-like high	39°C	35°C
Avg high / low	33° / 24°	30° / 26°
Rainfall	232 mm	180 mm
Rainy days	23	22
Humidity	86%	81%
Air quality (AQI)	53	27

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

Month by month

Chiang Mai vs Ko Pha Ngan in September — FAQ

Is September better in Chiang Mai or Ko Pha Ngan?: Ko Pha Ngan is the better pick in September — 70 vs 49 on SeasonMap's comfort score. Ko Pha Ngan is sweltering, soaked, clean air, while Chiang Mai is sweltering, soaked, muggy air.
What is the weather like in Chiang Mai vs Ko Pha Ngan in September?: In September, Chiang Mai averages 33°C high / 24°C low with about 232 mm of rain; Ko Pha Ngan averages 30°C high / 26°C low with about 180 mm.