September weather forecast and climate
Koh Chang, Thailand

Palm trees and few buildings along the white sandy beach in Koh Chang, Thailand, with a side view of the clear water, and a background view of the mountains
Palm trees and few buildings along the white sandy beach in Koh Chang, Thailand, with a side view of the clear water, and a background view of the mountains
September, the first month of the autumn, in Koh Chang, is still a hot month, with average temperature ranging between min 23°C (73.4°F) and max 30°C (86°F).

Temperature

June through September and December, with an average high-temperature of 30°C (86°F), are the coldest months.

Rainfall

In September, the rain falls for 23 days. Throughout September, 523mm (20.6") of precipitation is accumulated. Throughout the year, there are 170 rainfall days, and 3442mm (135.5") of precipitation is accumulated.

Sea temperature

In Koh Chang, Thailand, the average water temperature is 29.1°C (84.4°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.

Daylight

In September, the average length of the day in Koh Chang is 12.2h.

Sunshine

Months with the least sunshine in Koh Chang are June through September, with an average of 5h of sunshine.

UV index

February through October, with an average maximum UV index of 12, are months with the highest UV index in Koh Chang, Thailand. A UV Index reading of 11, and higher, represents an extreme threat to health from the exposure to the Sun's UV rays for ordinary individuals.
In September, the average maximum UV index of 12 translate into the following recommendations:
Practice all-important precautions. Light skin people may get burned in less than 5 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. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What are the coldest months in Koh Chang?

June through September and December, with an average high-temperature of 30°C (86°F), are the coldest months in Koh Chang.

What is the temperature in September in Koh Chang?

In Koh Chang, Thailand, in September, the average high-temperature is 30°C (86°F), and the average low-temperature is 23°C (73.4°F).

How much does it rain in Koh Chang in September?

In Koh Chang, in September, it is raining for 23 days, with typically 523mm (20.6") of accumulated precipitation.

How warm is the water in September in Koh Chang?

In Koh Chang, the average seawater temperature in September is 29.1°C (84.4°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 Koh Chang have in September?

In Koh Chang, Thailand, the average length of the day in September is 12.2h.

What is the month with the least sunshine in Koh Chang?

June through September, with an average of 5h of sunshine, are months with the least sunshine in Koh Chang, Thailand.

How many hours of sunshine does Koh Chang have in September?

In September, the average sunshine in Koh Chang is 5h.

What are the months with the highest UV index in Koh Chang?

Months with the highest UV index in Koh Chang are February through October, with an average maximum UV index of 12.

How high is the UV index in September in Koh Chang?

The average daily maximum UV index in September is 12. A UV Index reading of 11, and higher, represents an extreme health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Koh Chang, Thailand
  • Average high temperature in September: 30°C

The warmest month (with the highest average high temperature) is April (32°C).
Months with the lowest average high temperature are June, July, August, September and December (30°C).

  • Average low temperature in September: 23°C

The month with the highest average low temperature is May (24°C).
Coldest months (with the lowest average low temperature) are January and December (20°C).

Average rainfall in September - Koh Chang, Thailand
  • Average rainfall in September: 523mm

The wettest month (with the highest rainfall) is August (687mm).
The driest month (with the lowest rainfall) is December (26mm).

Average rainfall days in September - Koh Chang, Thailand
  • Average rainfall days in September: 23 days

The month with the highest number of rainy days is August (25 days).
Months with the lowest number of rainy days are January and December (3 days).

Average sea temperature in September - Koh Chang, Thailand
  • Average sea temperature in September: 29.1°C

The best month for swimming (with the highest average sea temperature) is May (30.3°C).
The coldest month (with the lowest average sea temperature) is January (27.7°C).

Average daylight in September / Average sunshine in September - Koh Chang, Thailand
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.8h).
The month with shortest days is December (Average daylight: 11.4h).

  • Average sunshine in September: 5h

Months with most sunshine are January and December (Average sunshine: 9h).
Months with least sunshine are June, July, August and September (Average sunshine: 5).

Average UV index in September - Koh Chang, Thailand
  • Average UV index in September: 12

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

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