Koh Chang Weather in September
September in Koh Chang brings high temperatures around 29°C (84°F) during the day, dropping to 26°C (79°F) at night, and as part of the rainy season, heavy rainfall is common.
Rainfall in Koh Chang in September
Koh Chang is in the rainy season in September, with rain on around 23 days and an average of 555 mm (22 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Koh Chang in September
September in Koh Chang brings typical temperatures with highs around 29°C (84°F) and lows of 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.
Sunshine in Koh Chang in September
The area sees fewer sunny days, with a projection of about 55 hours of sunshine. This reduced sunlight makes it ideal for those who prefer overcast conditions over bright sunny days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. December typically offers the best weather for Koh Chang.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Chang's climate page.
Koh Chang Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
77%
Precipitation
555 mm (22 in)
Rainy days
23 days
Humidity
86% *
Sunshine
55 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koh Chang typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Koh Chang in September
Browse day-by-day weather records for Koh Chang spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koh Chang historical weather extremes in September
Our historical data for Koh Chang spans 1976 to 2025, revealing these weather extremes.
- Koh Chang recorded its highest September temperature of 38°C (100°F) on September 2, 1988.
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 10, 1986.
- Koh Chang registered its coldest September night on September 7, 2014, with temperatures dropping to 22°C (72°F).
- The wettest September day on record brought 198 mm (7.8 in) of precipitation to Koh Chang (September 4, 2009).
Best Places in Thailand in September
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in September →
perfect weather
pleasant
tolerable
unpleasant
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What to Wear in Koh Chang in September
Warm but pleasant conditions in Koh Chang in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Koh Chang in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Chang's climate page.
Temperature Rainfall Sunshine Humidity
See the full Koh Chang climate overview or explore weather in Thailand.
