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

November 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
The last month of the autumn, November, is also a moderately hot month in Ko Samui, Thailand, with average temperature fluctuating between 29.2°C (84.6°F) and 24.1°C (75.4°F).

Temperature

In November, the average high-temperature is practically the same as in October - a still moderately hot 29.2°C (84.6°F). In Ko Samui, in November, the average low-temperature is 24.1°C (75.4°F).

Heat index

In November, the average heat index is estimated at a sweltering 36.5°C (97.7°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. Additional factors like activity, wind, metabolic differences, and differences in body mass, height, and shape affect individual temperature impact. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

November is the month with the most rainfall. Rain falls for 20 days and accumulates 506.6mm (19.9") of precipitation.

Sea temperature

In November, the average sea temperature is 29.2°C (84.6°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 Ko Samui, the average length of the day is 11.7h.

Sunshine

May through December, with an average of 6h of sunshine, are months with the least sunshine.

UV index

In November, the average daily maximum UV index is 11. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 11 transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 November in Ko Samui?

In November, in Ko Samui, the average high-temperature is 29.2°C (84.6°F), and the average low-temperature is 24.1°C (75.4°F). In November, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines both air temperature and relative humidity, is evaluated at 36.5°C (97.7°F).

What is the most humid month in Ko Samui?

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

What is the average humidity in November in Ko Samui?

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

How much does it rain in Ko Samui in November?

In Ko Samui, in November, during 20 rainfall days, 506.6mm (19.9") of precipitation is typically accumulated.

What is the rainiest month in Ko Samui?

November is the month with the most rainfall. Rain falls for 20 days and accumulates 506.6mm (19.9") of precipitation.

What is the water temperature in November in Ko Samui?

In November, the average sea temperature is 29.2°C (84.6°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

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

In Ko Samui, Thailand, the average length of the day in November is 11.7h.

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

May through December, with an average of 6h of sunshine, are months with the least sunshine.

How long on average sun shines in November in Ko Samui?

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

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

In Ko Samui, Thailand, the average daily maximum UV index in November is 11. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation.
Average temperature in November - Ko Samui, Thailand
  • Average high temperature in November: 29.2°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 November: 24.1°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 November - Ko Samui, Thailand
  • Average humidity in November: 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 November - Ko Samui, Thailand
  • Average rainfall in November: 506.6mm

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 November - Ko Samui, Thailand
  • Average rainfall days in November: 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 November - Ko Samui, Thailand
  • Average sea temperature in November: 29.2°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 November / Average sunshine in November - Ko Samui, Thailand
  • Average daylight in November: 11.7h

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 November: 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 November - Ko Samui, Thailand
  • Average UV index in November: 11

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).