Bangkok Climate by Month – Rainy Season, Temperature Averages
Summary
The climate figures for Bangkok are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,561 mm.
The rainy season runs May–October. The wettest month is September with 296.7 mm across 27 rain days; the driest is December at just 19.2 mm.
The hottest month is April (average high 34.3°C) and the coolest is October (30.9°C).
The most comfortable time to visit Bangkok is December — less rain and milder heat.
Monthly averages · 2016–2025
| Monthly averages | High | Low | Rainfall | Rainy season |
|---|---|---|---|---|
| January | 31.5° | 22.4° | 23 mm | 4 |
| February | 32.4° | 23.6° | 35 mm | 6 |
| March | 33.5° | 25.9° | 45 mm | 8 |
| April | 34.3° | 27.0° | 84 mm | 12 |
| May | 33.3° | 26.7° | 179 mm | 21 |
| June | 32.5° | 26.1° | 152 mm | 24 |
| July | 31.4° | 25.6° | 207 mm | 26 |
| August | 31.5° | 25.5° | 193 mm | 26 |
| September | 31.0° | 25.1° | 297 mm | 27 |
| October | 30.9° | 24.5° | 245 mm | 23 |
| November | 31.1° | 23.7° | 82 mm | 11 |
| December | 31.1° | 22.5° | 19 mm | 4 |