Ko Samui
Thailand
Long-term weather forecast
Long-term weather forecast

October 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
October, the same as September, is another warm autumn month in Ko Samui, Thailand, with average temperature varying between 24.3°C (75.7°F) and 29.6°C (85.3°F).

Temperature

In October, the average high-temperature is relatively the same as in September - a warm 29.6°C (85.3°F). In October, the average low-temperature is 24.3°C (75.7°F).

Heat index

The average heat index in October is calculated to a sweltering 37.8°C (100°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like activity, clothing, differences in body mass, height, and shape, and metabolic differences affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

October and November, with an average relative humidity of 85%, are most humid months in Ko Samui.

Rainfall

In Ko Samui, in October, it is raining for 20 days, with typically 309.8mm (12.2") of accumulated precipitation. In Ko Samui, during the entire year, the rain falls for 160 days and collects up to 1960.1mm (77.2") of precipitation.

Sea temperature

In Ko Samui, in October, the average water temperature is 29.3°C (84.7°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In October, the average length of the day is 11.9h.

Sunshine

Months with the least sunshine in Ko Samui are May through December, with an average of 6h of sunshine.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index in Ko Samui. A UV Index reading of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 12 in October interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in October in Ko Samui?

The average high-temperature, in October, is 29.6°C (85.3°F), while the average low-temperature is 24.3°C (75.7°F). In October, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that factores the actual air temperature with the relative humidity, is estimated at 37.8°C (100°F).

What are the most humid months in Ko Samui?

Months with the highest humidity are October and November, with an average relative humidity of 85%.

What is the average humidity in October in Ko Samui?

In October, the average relative humidity in Ko Samui, Thailand, is 85%.

How much does it rain in Ko Samui in October?

In Ko Samui, during October, the rain falls for 20 days and regularly aggregates up to 309.8mm (12.2") of precipitation.

What is the sea water temperature in October in Ko Samui?

In Ko Samui, in October, the average water temperature is 29.3°C (84.7°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

In Ko Samui, the average length of the day in October is 11.9h.

What is the month with the least sunshine in Ko Samui?

Months with the least sunshine in Ko Samui are May through December, with an average of 6h of sunshine.

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

In October, the average sunshine in Ko Samui, Thailand, is 6h.

When is the highest UV index in Ko Samui?

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

What is the UV index intensity in October in Ko Samui?

In Ko Samui, Thailand, the average daily maximum UV index in October is 12. A UV Index value of 11, and more, symbolizes an extreme health vulnerability from unprotected exposure to the UV radiation.
Average temperature in October - Ko Samui, Thailand
  • Average high temperature in October: 29.6°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 October: 24.3°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 October - Ko Samui, Thailand
  • Average humidity in October: 85%

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 October - Ko Samui, Thailand
  • Average rainfall in October: 309.8mm

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 October - Ko Samui, Thailand
  • Average rainfall days in October: 20 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 October - Ko Samui, Thailand
  • Average sea temperature in October: 29.3°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 October / Average sunshine in October - Ko Samui, Thailand
  • Average daylight in October: 11.9h

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 October: 6h

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 October - Ko Samui, Thailand
  • Average UV index in October: 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).