April weather forecast and climate
Ko Samui, Thailand

The scenic view of the striking Angthong National Marine Park in Ko Samui, Thailand, calm clear water all around
The scenic view of the striking Angthong National Marine Park in Ko Samui, Thailand, calm clear water all around
April, the same as March, in Ko Samui, Thailand, is another hot spring month, with average temperature ranging between max. 32.6°C (90.7°F) and min. 26.1°C (79°F).

Temperature

The warmest month is April, with an average high-temperature of 32.6°C (90.7°F) and an average low-temperature of 26.1°C (79°F).

Humidity

The average relative humidity is 81%.

Rainfall

In Ko Samui, Thailand, it is raining for 8 days, with typically 83.1mm (3.3") of accumulated precipitation. Throughout the year, there are 160 rainfall days, and 1960.1mm (77.2") of precipitation is accumulated.

Sea temperature

In Ko Samui, the average seawater temperature is 29.8°C (85.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Ko Samui, Thailand, the average length of the day is 12.3h.

Sunshine

In Ko Samui, the average sunshine in April is 8h.

UV index

Months with the highest UV index in Ko Samui, Thailand, are February through October, with an average UV index of 12.

What is the warmest month in Ko Samui?

April is the warmest month, with an average high-temperature of 32.6°C (90.7°F) and an average low-temperature of 26.1°C (79°F).

What is the temperature in April in Ko Samui?

The average high-temperature, in April, in Ko Samui, is 32.6°C (90.7°F), while the average low-temperature is 26.1°C (79°F).

What is the average humidity in April in Ko Samui?

In April, the average relative humidity in Ko Samui is 81%.

How many days does it rain in April in Ko Samui?

In April, the rain falls for 8 days. Throughout April, 83.1mm (3.3") of precipitation is accumulated.

How warm is the water in April in Ko Samui?

In April, the average sea temperature is 29.8°C (85.6°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Ko Samui have in April?

The average length of the day in April in Ko Samui, Thailand, is 12.3h.

How many hours of sunshine does Ko Samui have in April?

In Ko Samui, the average sunshine in April is 8h.

What are the months with the highest UV index in Ko Samui?

February through October, with an average UV index of 12, are months with the highest UV index.

How high is the UV index in April in Ko Samui?

In April, the average UV index is 12.
Average temperature in April - Ko Samui, Thailand
  • Average high temperature in April: 32.6°C

The warmest month (with the highest average high temperature) is April (32.6°C).
The month with the lowest average high temperature is January (29°C).

  • Average low temperature in April: 26.1°C

The month with the highest average low temperature is April (26.1°C).
The coldest month (with the lowest average low temperature) is December (23.9°C).

Average humidity in April - Ko Samui, Thailand
  • Average humidity in April: 81%

Months with the highest relative humidity are October and November (85%).
Months with the lowest relative humidity are June, July and August (78%).

Average rainfall in April - Ko Samui, Thailand
  • Average rainfall in April: 83.1mm

The wettest month (with the highest rainfall) is November (506.6mm).
The driest month (with the lowest rainfall) is February (54.4mm).

Average rainfall days in April - Ko Samui, Thailand
  • Average rainfall days in April: 8 days

Months with the highest number of rainy days are October and November (20 days).
The month with the lowest number of rainy days is March (4 days).

Average sea temperature in April - Ko Samui, Thailand
  • Average sea temperature in April: 29.8°C

The best month for swimming (with the highest average sea temperature) is May (30.1°C).
The coldest month (with the lowest average sea temperature) is January (27.8°C).

Average daylight in April / Average sunshine in April - Ko Samui, Thailand
  • Average daylight in April: 12.3h

The month with the longest days is June (Average daylight: 12.7h).
Months with shortest days are January and December (Average daylight: 11.6h).

  • Average sunshine in April: 8h

The month with most sunshine is February (Average sunshine: 9h).
Months with least sunshine are May, June, July, August, September, October, November and December (Average sunshine: 6).

Average UV index in April - Ko Samui, Thailand
  • Average UV index in April: 12

Months with the highest UV index are February, March, April, May, June, July, August, September and October (UV index 12).
The month with the lowest UV index is December (UV index 10).

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