Tbong Khmum Climate by Month – Rainy Season, Temperature Averages
Summary
The climate figures for Tbong Khmum are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 2,123 mm.
The rainy season runs May–November. The wettest month is September with 407.1 mm across 29 rain days; the driest is February at just 16.4 mm.
The hottest month is March (average high 34.9°C) and the coolest is October (30.4°C).
The most comfortable time to visit Tbong Khmum is February — less rain and milder heat.
Monthly averages · 2016–2025
| Monthly averages | High | Low | Rainfall | Rainy season |
|---|---|---|---|---|
| January | 32.7° | 22.6° | 21 mm | 4 |
| February | 34.0° | 23.1° | 16 mm | 3 |
| March | 34.9° | 24.4° | 49 mm | 6 |
| April | 34.8° | 25.5° | 99 mm | 14 |
| May | 33.2° | 25.6° | 244 mm | 25 |
| June | 31.9° | 25.0° | 217 mm | 26 |
| July | 31.1° | 24.7° | 311 mm | 29 |
| August | 31.2° | 24.6° | 297 mm | 28 |
| September | 30.4° | 24.1° | 407 mm | 29 |
| October | 30.4° | 23.6° | 280 mm | 25 |
| November | 30.6° | 23.4° | 148 mm | 15 |
| December | 31.2° | 22.9° | 33 mm | 5 |