Ko Chang (Southern Thailand), Thailand in September

September29°C average high

September is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.

Warmest monthsFebruary to April

This stretch sets the upper range for average daytime heat.

September591mm average rain

September is one of Ko Chang (Southern Thailand)'s wettest months, so rain is likely to be a major planning factor.

Driest monthsJanuary to April and November to December

This is the drier part of the year, when outdoor plans usually need less weather flexibility.

September5.2 hours average sun

September is one of Ko Chang (Southern Thailand)'s cloudier months, so sunshine-led plans are less reliable.

Brightest monthsJanuary to April

This stretch has the strongest sunshine in the monthly averages.

September29°C average sea

September is below Ko Chang (Southern Thailand)'s yearly sea-temperature average, so swimming can feel fresher.

Warmest seaMarch to June

Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.

September52 weather score

September is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.

Best weather monthsJanuary to March and December

These months have the strongest weather score in the monthly averages.