January Weather in Ko Samui

Last updated: March 2, 2024

The weather in Ko Samui, Thailand, during January is characterized by an average temperature of 27°C (80°F). Highs can soar to 28°C (83°F), while lows may dip to 25°C (78°F). Typically, the humidity level in Ko Samui throughout January hovers around 72%.

25°C (78°F)

Minimum temperature

27°C (80°F)

Average temperature

28°C (83°F)

Maximum temperature

72%

Humidity

Precipitation and Sunshine hours

In January, Ko Samui averages 144 mm (5.7 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 11 hours 37 minutes of daylight, with the sun shining for approximately 8 hours 6 minutes each day. Additionally, there is a 32% probability of sunny days during this period.

144 mm (5.7 inches)

Precipitation

13 rainy days

Rainy days

8 hours 6 minutes

Sunshine hours

32%

Chance of sun

UV Index

In January, the UV Index in Ko Samui reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00
UVI	1	2	4	7	9	11	11	9	6	3	1	1	0
Exposure	Low		Moderate	High	VeryHigh	Extreme		VeryHigh	High	Moderate	Low
Time to burn	45 min		30 min	25 min	15 min	10 min		15 min	25 min	30 min	45 min