The hottest month in Ko Chang is April when the average maximum temperature is 32°, average temperature is 29° and average minimum temperature is 26°.
The coolest month in Ko Chang is January when the average maximum temperature is 31°, average temperature is 27° and average minimum temperature is 22°.
The longest days in Ko Chang are in June, with an average of 12.8 hours of daylight per day. December has the shortest days with an average of 11.4 hours of daylight per day.
The sunniest days in Ko Chang are in January which has the most hours of sunshine per day with an average of 7.4 hours of sunshine per day, making it a quite sunny month with some cloud cover. August has the least sunshine with an average of 4.4 hours of sunshine per day, making it a sunny month that is overcast at times.
The ultraviolet index is the highest in April when it reaches 14.8 and lowest in December when it reaches 10.
An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Ko Chang are found in July when they peak at 30° and lowest in December when they dip to 26°.
The sea is best for swimming between December and October when the temperature is above 29° which is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Ko Chang is September with 50.2cm of rain and August has the most days of rain with 26 days with some rain, a very wet time to visit the beach.
The driest month in Ko Chang is December with 1.6cm of rain and the least days of rain with 2 days with some rain, an extremely dry time to visit the beach.
The most humid month in Ko Chang is May with a dew point (an indicator of humidity) of 26° which is extremely humid and uncomfortable unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Ko Chang is December with a dew point of 21° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
The most windy month in Ko Chang is December when the average maximum windspeed is 25kmh and the average wind speed is 14kmh.
The least windy month in Ko Chang is October when the average maximum windspeed is 19kmh and the average wind speed is 8kmh.