What is the weather like in Chiang Mai vs Ko Samui in May?

In May, Chiang Mai averages 36°C high / 25°C low with about 94 mm of rain; Ko Samui averages 33°C high / 26°C low with about 131 mm.

Chiang Mai vs Ko Samui in May

Ko Samui is the better pick in May — 77 vs 52 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Chiang Mai is sweltering, rainy.

Chiang Mai vs Ko Samui — May climate, side by side

	🇹🇭 Chiang Mai	🇹🇭 Ko Samui
Comfort score	52/100 (D)	77/100 (B)
Feels-like high	41°C	40°C
Avg high / low	36° / 25°	33° / 26°
Rainfall	94 mm	131 mm
Rainy days	12	20
Humidity	68%	79%
Air quality (AQI)	67	35

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

Month by month

Chiang Mai 🇹🇭 Thailandsweltering, rainy · best January52
Ko Samui 🇹🇭 Thailandsweltering, rainy, clean air · best March77

Chiang Mai vs Ko Samui in May — FAQ

Is May better in Chiang Mai or Ko Samui?: Ko Samui is the better pick in May — 77 vs 52 on SeasonMap's comfort score. Ko Samui is sweltering, rainy, clean air, while Chiang Mai is sweltering, rainy.
What is the weather like in Chiang Mai vs Ko Samui in May?: In May, Chiang Mai averages 36°C high / 25°C low with about 94 mm of rain; Ko Samui averages 33°C high / 26°C low with about 131 mm.