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Climate month by month
Official 30-year averages (1991–2020) measured by the Thai Meteorological Department at its Don Muang Airport station, 48 km from Ayutthaya. Source (TMD, PDF)
| Month | Day / Night | Rainfall | Rainy days | Humidity | Years of data |
|---|---|---|---|---|---|
| January | 32.1°C / 22.9°C | 16 mm | 2 | 66% | 30 |
| February | 33.6°C / 24.1°C | 12 mm | 1 | 68% | 30 |
| March | 34.9°C / 25.8°C | 50 mm | 4 | 70% | 30 |
| April | 35.8°C / 26.7°C | 92 mm | 7 | 71% | 30 |
| May | 35.0°C / 26.7°C | 214 mm | 15 | 73% | 30 |
| June | 34.1°C / 26.5°C | 191 mm | 16 | 74% | 30 |
| July | 33.5°C / 26.3°C | 180 mm | 16 | 74% | 30 |
| August | 33.3°C / 26.1°C | 183 mm | 18 | 75% | 30 |
| September | 33.1°C / 25.6°C | 300 mm | 20 | 79% | 30 |
| October | 32.6°C / 25.4°C | 192 mm | 15 | 77% | 30 |
| November | 32.3°C / 24.5°C | 33 mm | 4 | 69% | 30 |
| December | 31.6°C / 22.9°C | 12 mm | 1 | 65% | 30 |
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