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Climate month by month
Official 30-year averages (1991–2020) measured by the Thai Meteorological Department at its Hua Hin station, 24 km from Cha-am. Source (TMD, PDF)
| Month | Day / Night | Rainfall | Rainy days | Humidity | Years of data |
|---|---|---|---|---|---|
| January | 29.9°C / 22.8°C | 25 mm | 2 | 71% | 30 |
| February | 31.1°C / 23.6°C | 14 mm | 1 | 73% | 30 |
| March | 32.3°C / 24.9°C | 51 mm | 3 | 74% | 30 |
| April | 33.4°C / 26.0°C | 47 mm | 4 | 73% | 30 |
| May | 33.7°C / 26.3°C | 96 mm | 12 | 74% | 30 |
| June | 33.4°C / 26.1°C | 82 mm | 13 | 74% | 30 |
| July | 33.0°C / 25.7°C | 90 mm | 15 | 74% | 30 |
| August | 32.9°C / 25.6°C | 67 mm | 14 | 74% | 30 |
| September | 32.3°C / 25.3°C | 130 mm | 16 | 77% | 30 |
| October | 31.0°C / 24.8°C | 250 mm | 16 | 80% | 30 |
| November | 30.6°C / 24.5°C | 73 mm | 5 | 73% | 30 |
| December | 29.8°C / 23.3°C | 12 mm | 2 | 68% | 30 |
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