The climate in Ko Samui during January can be summarized as hot, humid and wet.
January is in the winter in Ko Samui and is typically the coldest month of the year. Daytime maximum temperatures average around a steamy 29°C (84°F), whilst at night 22°C (72°F) is normal.
|Daytime temperature||28.6°C 83.5°F|
|Nightly temperature||22.2°C 72°F|
|Average temperature||25.4°C 77.7°F|
|Daily sunshine||7.6 hrs|
|Avg rainfall||123 mm 4.8 ins|
|Rainy days||10 days|
|Sea temperature||28°C 82.4°F|
|Windspeed||9.7kph 6 mph|
On average January is the 5th driest month of the year in Ko Samui with around 123mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.6 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ko Samui in January 2023.
Best places to visit in January
|Hottest month:||April||31.6°C 88.9°F|
|Driest month:||February||39mm 1.5ins|
|Coldest month:||January||28.4°C 83.1°F|
|Wettest month:||November||463mm 18.2ins|