Koh Chang weather in September 2025

Expect 86°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Koh Chang in September. Check more long-term weather averages for Koh Chang in September before you book your next holiday to Thailand in 2025/2026.

86
86°F max day temperature
5
5 hours of sunshine per day
23
23 days with some rainfall
73
73°F min night temperature
12
12 hours of daylight per day
H
High heat & humidity
20.6
20.6 inches of monthly rainfall
11
11+ (Extreme) UV index
82
82°F sea temperature

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The September weather guide for Thailand (Koh Chang) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

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How hot is it in Koh Chang in September?

Daytime temperatures usually reach 86°F in Koh Chang in September with high heat and humidity, falling to 73°F at night.

How sunny is it in Koh Chang in September?

There are normally 5 hours of bright sunshine each day in Koh Chang in September - that's 39% of daylight hours.

How warm is the sea around Koh Chang in September?

The average sea temperature around Koh Chang in September is 82°F.

Does it rain in Koh Chang in September?

There are usually 23 days with some rain in Koh Chang in September and the average monthly rainfall is 20.6 inches.

Koh Chang September sunrise & sunset times

Browse the sunrise and sunset times for Koh Chang in September 2025. Select a month to view Koh Chang sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	06:00	18:21
Monday, 15th September 2025	06:00	18:12
Tuesday, 30th September 2025	06:00	18:02

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Thailand - quick facts
Flight time^✝	15 hours
Time difference	UK +7 hours
Language(s)	Thai, Isan
Currency	Thai Baht
Electricity	A + B + C + O plug (230V)
Driving side	Left
Why visit?	Beaches Culture Nature Nightlife
Tourist info	Tourism Authority of Thailand