November weather forecast
Ko Samui, Thailand

Ko Samui, Thailand, in November experiences the year's highest amount of rainfall measuring 507mm (19.96"). This exceptional volume of rain signifies the peak of the monsoon season. The main highlights are the lush greenery and fresh atmosphere that these showers bring along. The hustle-bustle of the city subsides a bit during this period. Tourists are drawn to the indoor attractions awaiting the decrease in rainfall that December brings.

Temperature

The commencement of November introduces an average high-temperature of a still warm 29.2°C (84.6°F), closely mirroring the preceding month. In November, the average low-temperature is a still warm 24.1°C (75.4°F).

Heat index

In November, the average heat index is computed to be a sweltering 36°C (96.8°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', is a composite of temperature and humidity figures to convey how warm it feels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Youngsters typically face more danger than adults since they sweat less. Their larger skin surface compared to their small bodies and heightened heat production from their activities augment their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

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

Rainfall

The month with the most rainfall is November, when the rain falls for 20 days and typically aggregates up to 507mm (19.96") of precipitation.

Sea temperature

In Ko Samui, the average seawater temperature in November is 29.2°C (84.6°F).
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In Ko Samui, the average length of the day in November is 11h and 42min.
On the first day of November, sunrise is at 06:09 and sunset at 17:57. On the last day of the month, sunrise is at 06:20 and sunset at 17:57 +07.

Sunshine

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

UV index

The average daily maximum UV index in November is 11. A UV Index value of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV radiation for average individuals.
Note: In November, a daily UV index of 11 turns into the following recommendations:
Take all critical precautions, unprotected skin might burn swiftly. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. A sunscreen boasting a minimum SPF of 30 should be generously applied and reapplied even on cloudy days, post swim or outdoor exercise. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.