What is the weather like in Bangkok vs Ko Samui in January?

In January, Bangkok averages 33°C high / 24°C low with about 21 mm of rain; Ko Samui averages 29°C high / 25°C low with about 100 mm.

Bangkok vs Ko Samui in January

Ko Samui is the better pick in January — 84 vs 73 on SeasonMap's comfort score. Ko Samui is hot, rainy, muggy air, while Bangkok is sweltering, dry, poor air quality.

Bangkok vs Ko Samui — January climate, side by side

	🇹🇭 Bangkok	🇹🇭 Ko Samui
Comfort score	73/100 (B)	84/100 (A)
Feels-like high	36°C	33°C
Avg high / low	33° / 24°	29° / 25°
Rainfall	21 mm	100 mm
Rainy days	4	10
Humidity	66%	78%
Air quality (AQI)	154	62

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

Month by month

Bangkok vs Ko Samui in January — FAQ

Is January better in Bangkok or Ko Samui?: Ko Samui is the better pick in January — 84 vs 73 on SeasonMap's comfort score. Ko Samui is hot, rainy, muggy air, while Bangkok is sweltering, dry, poor air quality.
What is the weather like in Bangkok vs Ko Samui in January?: In January, Bangkok averages 33°C high / 24°C low with about 21 mm of rain; Ko Samui averages 29°C high / 25°C low with about 100 mm.