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Climate month by month
Official 30-year averages (1991–2020) measured by the Thai Meteorological Department at its Mae Hong Son station, 50 km from Pai. Source (TMD, PDF)
| Month | Day / Night | Rainfall | Rainy days | Humidity | Years of data |
|---|---|---|---|---|---|
| January | 29.8°C / 14.5°C | 11 mm | 1 | 76% | 30 |
| February | 33.3°C / 14.7°C | 6 mm | 1 | 66% | 30 |
| March | 36.9°C / 18.2°C | 19 mm | 2 | 57% | 30 |
| April | 38.9°C / 22.9°C | 60 mm | 6 | 56% | 30 |
| May | 36.3°C / 23.9°C | 169 mm | 17 | 71% | 30 |
| June | 33.6°C / 24.0°C | 180 mm | 22 | 80% | 30 |
| July | 32.4°C / 23.7°C | 226 mm | 24 | 83% | 30 |
| August | 32.1°C / 23.5°C | 259 mm | 26 | 84% | 30 |
| September | 32.9°C / 23.3°C | 201 mm | 20 | 83% | 30 |
| October | 32.7°C / 22.2°C | 117 mm | 13 | 82% | 30 |
| November | 31.0°C / 19.4°C | 40 mm | 5 | 80% | 30 |
| December | 28.8°C / 16.2°C | 11 mm | 2 | 79% | 30 |
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