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Climate month by month
Official 30-year averages (1991–2020) measured by the Thai Meteorological Department at its Chanthaburi station. Source (TMD, PDF)
| Month | Day / Night | Rainfall | Rainy days | Humidity | Years of data |
|---|---|---|---|---|---|
| January | 32.6°C / 22.1°C | 28 mm | 3 | 69% | 30 |
| February | 32.9°C / 23.2°C | 36 mm | 4 | 74% | 30 |
| March | 33.3°C / 24.4°C | 84 mm | 7 | 77% | 30 |
| April | 34.1°C / 25.0°C | 128 mm | 10 | 78% | 30 |
| May | 33.3°C / 25.3°C | 372 mm | 22 | 83% | 30 |
| June | 32.2°C / 25.2°C | 500 mm | 24 | 84% | 30 |
| July | 31.7°C / 25.0°C | 511 mm | 25 | 84% | 30 |
| August | 31.5°C / 25.0°C | 456 mm | 24 | 84% | 30 |
| September | 31.6°C / 24.6°C | 538 mm | 25 | 86% | 30 |
| October | 32.4°C / 24.2°C | 273 mm | 18 | 82% | 30 |
| November | 32.6°C / 23.4°C | 57 mm | 6 | 72% | 30 |
| December | 32.1°C / 22.1°C | 8 mm | 2 | 67% | 30 |
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