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 make the sky look grey. If you are hoping for clear beach weather, consider air quality as well as rainfall.
Before choosing your travel dates
The basic facts list February as the hottest month, while the monthly notes point to March and April. The facts also list only June as the wettest month, but the table shows 550 mm in each month from June to September. 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 the table below to see which months are hotter or wetter. These are historical climate averages; they do not provide a forecast for your travel dates or tell you whether swimming will be permitted or safe.
| Month | Travel rating | Temperature | Rainfall | Rainy days | Humidity | Sunshine hours | Sea conditions |
|---|---|---|---|---|---|---|---|
| January | ++ Very good | 20~31°C | 20 mm | 3 days | 74% | 9 hours | Calm |
| February | ++ Very good | 21~33°C | 50 mm | 5 days | 72% | 9 hours | Calm |
| March | + Good | 23~33°C | 90 mm | 7 days | 74% | 9 hours | Calm |
| April | + Good | 24~33°C | 120 mm | 9 days | 77% | 9 hours | Calm |
| May | - Not recommended | 24~31°C | 350 mm | 20 days | 80% | 8 hours | Moderate |
| June | - Not recommended | 23~30°C | 550 mm | 23 days | 82% | 7 hours | Rough |
| July | - Not recommended | 23~30°C | 550 mm | 21 days | 82% | 7 hours | Rough |
| August | - Not recommended | 23~30°C | 550 mm | 23 days | 83% | 7 hours | Rough |
| September | - Not recommended | 22~29°C | 550 mm | 22 days | 85% | 6 hours | Rough |
| October | - Not recommended | 23~30°C | 300 mm | 20 days | 83% | 7 hours | Moderate |
| November | ++ Very good | 21~30°C | 50 mm | 5 days | 78% | 9 hours | Moderate |
| December | ++ Very good | 20~30°C | 30 mm | 3 days | 72% | 9 hours | Calm |
| Month | Weather and travel advice |
|---|---|
| January | This is the driest month, with cooler, sunny weather. Some haze from forest fires in Cambodia may reach the island. |
| February | The weather is clear and dry, but air pollution from Cambodia can make the sky hazy. |
| March | The weather is warm and mostly dry. This is one of the months with the longest sunshine hours. |
| April | The heat remains strong, as in March. Night-time thunderstorms become more frequent. |
| May | The rainy season begins around the middle of the month, and rainfall increases quickly. |
| June | The rainy season continues. Showers fall mainly at night, while afternoons are generally clear. |
| July | This is one of the wettest months. Rain is persistent, but there are still sunny spells during the day. |
| August | Rainfall is heavy, as in July. There are sunny spells between showers. |
| September | The chance of storms and flooding is at its highest. Heavy rain may affect your travel plans. |
| October | The rainy season is drawing to a close, but rainfall varies considerably from year to year. |
| November | Northerly winds arrive as the dry season approaches. This is one of the better months to visit. |
| December | Days are dry and sunny. Northerly winds bring cooler evenings. |