Koh Chang · AutumnMonth summary
Koh Chang weather in September
⚠️ Fair
🌡️ Temperature min / max
72°F – 79°F
🌧 Rainy days
96% of days
☀️ Sunshine
7.9h per day on average
🌊 🌊 Season
Autumn
⭐ ⭐ Weather score
6.1/10
📅 📅 Best month
December (8.8/10)
Quick decision
Should you visit Koh Chang in September?
⚠️ Fair
✅ Yes if: you're willing to accept showers in exchange for lower prices and fewer tourists.
❌ No if: you're planning 100% outdoor activities — rain is frequent.
Our take: Not the best window: 96% rain risk and 7.9h of sunshine. December is much safer.
By trip type
Koh Chang in September by trip type
- 🏙️ 🏙️ City break / culture : ⚠️ Possible
- 🚶 🚶 Outdoor activities : ⚠️ Possible
- 🏖️ Beach / swimming : ❌ Not recommended
- 💰 💰 Budget : ✅ Low season
Local context
What to expect in September
Autumn marks the end of peak season in Koh Chang. Temperatures drop (26°F) and rain returns (96% of days). With 96% of rainy days, always have indoor alternatives planned. Not the best window, but acceptable if dates are constrained. December (8.8/10) is significantly better if possible.
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All months for Koh Chang
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 72°F | 82°F | 29% | 0.1in | 11.0h | 8.3/10 |
| 🌤️ February | 72°F | 82°F | 34% | 0.1in | 11.0h | 8.2/10 |
| 🌤️ March | 73°F | 82°F | 54% | 0.1in | 11.1h | 7.6/10 |
| 🌤️ April | 75°F | 84°F | 59% | 0.2in | 11.7h | 7.4/10 |
| 🌦️ May | 75°F | 82°F | 88% | 0.4in | 10.0h | 7.1/10 |
| 🌧️ June | 73°F | 81°F | 93% | 0.6in | 9.5h | 6.9/10 |
| 🌧️ July | 72°F | 79°F | 96% | 0.8in | 8.1h | 6.2/10 |
| 🌧️ August | 72°F | 79°F | 98% | 0.6in | 9.2h | 6.4/10 |
| 🌧️ September | 72°F | 79°F | 96% | 0.7in | 7.9h | 6.1/10 |
| 🌧️ October | 72°F | 81°F | 81% | 0.4in | 9.4h | 7.1/10 |
| 🌤️ November | 72°F | 82°F | 45% | 0.1in | 10.7h | 7.8/10 |
| ☀️ December | 72°F | 82°F | 16% | 0.0in | 10.9h | 8.8/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In September, Koh Chang averages 79°F, 96% rainy days and 7.9h of sunshine per day. Overall weather score: 6.1/10.
See methodology →
Comparison
September vs December (best month)
The best month is December (score 8.8/10). Difference:
- 🌡️ Max temperature : +2°F
- 🌧 Rainy days : -80%
- ☀️ Sunshine : +3.0h/day
FAQ
FAQ — Koh Chang in September
Is September a good time to visit Koh Chang?
September is an acceptable time for Koh Chang (score 6.1/10). Conditions are decent but not optimal — consider December (8.8/10) if possible.
Does it rain a lot in Koh Chang in September?
Yes, 96% of days see rain in September. Plan some indoor activities as backup.
Accommodation
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Activities & tours
Activities and tours in Koh Chang
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