Koh Chang monthly weather and climate
Koh Chang · Eastern Gulf of Thailand
Koh Chang's dry season runs from November to March. Rain increases sharply from May, with heavy rainfall continuing from June to September. Even with little rain in January and February, haze from Cambodia can obscure the sky. If you are hoping for clear beach weather, consider air quality as well as rainfall.
Before choosing your travel dates
The facts list February as the hottest month, while the monthly commentary points to March and April. The facts also list June alone as the wettest month, but the table gives June, July, August and September 550 mm each. Keep these differences in mind when comparing months.
When are the dry and rainy seasons?
- Best time to visit
- Nov–Mar
- Dry season
- Nov–Mar
- Rainy season
- May–Oct
- Hottest month
- Feb (33°C)
- Wettest month
- Jun (550 mm)
Monthly weather and climate
Compare hotter and wetter months in the table below. These are historical climate averages: they are not a forecast for your travel dates and do not tell you whether swimming will be possible.
| Month | Travel rating | Temperature | Rainfall | Rainy days | Humidity | Sunshine | Sea conditions |
|---|---|---|---|---|---|---|---|
| January | ++ Very good | 20~31°C | 20 mm | 3 d | 74% | 9 h | Calm |
| February | ++ Very good | 21~33°C | 50 mm | 5 d | 72% | 9 h | Calm |
| March | + Good | 23~33°C | 90 mm | 7 d | 74% | 9 h | Calm |
| April | + Good | 24~33°C | 120 mm | 9 d | 77% | 9 h | Calm |
| May | - Not recommended | 24~31°C | 350 mm | 20 d | 80% | 8 h | Moderate |
| June | - Not recommended | 23~30°C | 550 mm | 23 d | 82% | 7 h | Rough |
| July | - Not recommended | 23~30°C | 550 mm | 21 d | 82% | 7 h | Rough |
| August | - Not recommended | 23~30°C | 550 mm | 23 d | 83% | 7 h | Rough |
| September | - Not recommended | 22~29°C | 550 mm | 22 d | 85% | 6 h | Rough |
| October | - Not recommended | 23~30°C | 300 mm | 20 d | 83% | 7 h | Moderate |
| November | ++ Very good | 21~30°C | 50 mm | 5 d | 78% | 9 h | Moderate |
| December | ++ Very good | 20~30°C | 30 mm | 3 d | 72% | 9 h | Calm |
| Month | Weather and travel advice |
|---|---|
| January | The driest month brings relatively cool, sunny weather. Some haze from forest fires in Cambodia may still reach the island. |
| February | The weather is clear and dry. Air pollution arriving from Cambodia can nevertheless make the sky hazy. |
| March | Conditions are warm and mostly dry. This is one of the months with the most hours of sunshine. |
| April | The heat remains strong, as in March. Thunderstorms become more frequent at night. |
| May | The rainy season starts around the middle of the month, and rainfall increases rapidly. |
| June | Rainy-season weather continues. Showers fall mainly at night, while afternoons are generally clear. |
| July | This is one of the wettest months. Rain is persistent, but there can still be sunshine during the day. |
| August | Heavy rain continues, as in July. There are still sunny spells between showers. |
| September | The likelihood of storms and flooding is at its highest. Heavy rainfall may disrupt travel plans. |
| October | The rainy season is nearing its end, but rainfall varies considerably from year to year. |
| November | Northerly winds accompany the transition to the dry season. This is one of the better months to visit. |
| December | Days are dry and sunny. Northerly winds bring cooler evenings. |