September weather forecast
Koh Chang, Thailand

September witnesses a subtle change in the weather patterns in Koh Chang. While the rainfall days stay consistently high, there is a slight decline in rainfall from August, signifying the gradual transition to the dry season. Despite a minor cooling trend in ocean temperatures, marine activities maintain their interest. Splashes of sunshine start to infiltrate the skies more frequently, heralding the end of the monsoon. Nevertheless, September still secures a significant rainfall of 523mm (20.59").

Temperature

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

Rainfall

In Koh Chang, in September, during 23 rainfall days, 523mm (20.59") of precipitation is typically accumulated. Throughout the year, in Koh Chang, there are 170 rainfall days, and 3442mm (135.51") of precipitation is accumulated.

Sea temperature

In Koh Chang, in September, the average water temperature is 29.1°C (84.4°F).
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

In Koh Chang, the average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:21. On the last day of September, sunrise is at 05:59 and sunset at 18:01 +07.

Sunshine

The months with the least sunshine are June through September, with an average of 5h of sunshine.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In September, a daily UV index of 12 turns into the following recommendations:
Undertake all key precautions, as unprotected skin and eyes may get burns in no time. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Frequent reapplication of a broad-spectrum SPF 30+ sunscreen is vital every two hours or directly after a swim or an outdoor workout. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.