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April is the hottest month in Bangkok, with an average high of 36°C / 96°F; December is the coldest (32°C / 90°F). September is the wettest month, averaging 328 mm / 12.9 in of precipitation.
| Month | High °C / °F | Low °C / °F | Precip mm / in | Wet days |
|---|---|---|---|---|
| Jan | 33 / 91 | 23 / 74 | 38 / 1.5 | 2 |
| Feb | 34 / 92 | 25 / 77 | 34 / 1.3 | 3 |
| Mar | 35 / 94 | 26 / 79 | 54 / 2.1 | 4 |
| Apr | 36 / 96 | 27 / 81 | 96 / 3.8 | 6 |
| May | 35 / 95 | 27 / 80 | 213 / 8.4 | 13 |
| Jun | 34 / 93 | 26 / 79 | 200 / 7.9 | 14 |
| Jul | 33 / 92 | 26 / 79 | 197 / 7.8 | 15 |
| Aug | 33 / 92 | 26 / 79 | 230 / 9.1 | 16 |
| Sep | 33 / 92 | 25 / 78 | 328 / 12.9 | 18 |
| Oct | 33 / 91 | 25 / 77 | 287 / 11.3 | 15 |
| Nov | 33 / 92 | 25 / 76 | 53 / 2.1 | 4 |
| Dec | 32 / 90 | 23 / 73 | 19 / 0.7 | 2 |
Extremes since 1951: highest 41°C / 106°F (May 7, 2023), lowest 10°C / 50°F (January 12, 1955).
Daylight lasts about 12.8 hours in June and 11.2 hours in December.
Data: Meteostat — Bangkok, 1991–2020 averages.
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