May weather forecast
Koh Chang, Thailand

May rings in the bells for the rainy season in Koh Chang. Compared to the preceding month, a drastic increase in rainfall takes center stage, indicating the wet season's full swing. With the heat persisting from April, May ensures a natural sauna effect, suitable for visitors who enjoy high humidity. The sea remains welcoming to swimmers throughout. Despite the regular themes of drier months, the notable feature of May is the amplified rainfall to a solid 351mm (13.82").

Temperature

Koh Chang's shift into May is marked by a subtle change to a still hot 31°C (87.8°F) from April's 32°C (89.6°F) in temperature. The mean low-temperature during May nights is a warm 24°C (75.2°F).

Rainfall

In Koh Chang, during May, the rain falls for 20 days and regularly aggregates up to 351mm (13.82") of precipitation. In Koh Chang, during the entire year, the rain falls for 170 days and collects up to 3442mm (135.51") of precipitation.

Sea temperature

With an average sea temperature of 30.3°C (86.5°F), May is the month with the warmest seawater.
Note: Swimming in waters heated beyond 30°C (86°F) can arguably feel less refreshing.

Daylight

The average length of the day in May is 12h and 41min.
On the first day of the month, sunrise is at 05:50 and sunset at 18:24. On the last day of May, sunrise is at 05:44 and sunset at 18:31 +07.

Sunshine

The average sunshine in May is 6h.

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 ultimate health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 12 during May translates into the following guidance:
Employ every precaution of importance, unprotected skin and eyes could burn within moments. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Despite the clouds, sunscreen with an SPF of at least 30 should be used liberally and reapplied frequently, especially after a swim or outdoor workout. Warning! Sand and water reflections boost the intensity of UV exposure.