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Cambodia Weather & Best Time to Visit
Rainfall and heat, month by month, for each region, so you can pick dates with your eyes open. Climate normals from Open-Meteo archive API (ERA5 reanalysis) (2015-01-01 → 2024-12-31), not a day-by-day forecast.
The short answer
November to March
The dry, cooler window: clear mornings, comfortable sightseeing, and the coast at its calmest seas. April is the hottest month; June–October brings the green season and short afternoon rain.
- Dry window
- Nov–Apr
- Wettest month
- Sep · 318 mm · 27 rainy days
- Daytime highs
- 30.2–34.2°C
Rainfall & daytime highs, month by month
| Month | Rainfall | Daytime high |
|---|---|---|
| Jan | 16 mm | 31.1°C |
| Feb | 26 mm | 32.2°C |
| Mar | 51 mm | 33.8°C |
| Apr | 97 mm | 34.2°C |
| May | 188 mm | 33.3°C |
| Jun | 144 mm | 32.5°C |
| Jul | 211 mm | 31.7°C |
| Aug | 204 mm | 31.7°C |
| Sep | 318 mm | 30.6°C |
| Oct | 249 mm | 30.4°C |
| Nov | 102 mm | 30.7°C |
| Dec | 27 mm | 30.2°C |
Monthly normals of daily maximum temperature and rainfall, averaged over 2015-01-01 → 2024-12-31. Historical climate averages: not a real-time forecast. Source: Open-Meteo archive API (ERA5 reanalysis) · Data refreshed 2026-07-18.
Right now across Cambodia
Live readings, city by city — switch between weather, UV index and air quality. Refreshed hourly (Open-Meteo).
Cambodia's three seasons
One tropical climate, three practical seasons. The cool dry season (November–February) is peak travel weather: clear skies, lower humidity, comfortable mornings. The hot dry season (March–May) climbs toward 35°C before the rains break. The green (wet) season (June–October) is lush and quiet, with short, heavy afternoon downpours rather than all-day rain.
Coast vs. inland
The islands and southern coast catch more rain than the temple plains: Koh Rong peaks near 520 mm in September, while Siem Reap tops out around 318 mm. Switch regions on the chart above to compare your exact route.
FAQ
- What is the best time to visit Cambodia weather-wise?
- November to March is the sweet spot: dry, less humid and cooler, with Siem Reap seeing only ~3 rainy days in its driest month (January). March–May stays dry but hot; June–October is the green season with short, heavy afternoon downpours.
- Does it rain all day in the wet season?
- Rarely. Even in the wettest month, rain usually comes as a short, heavy afternoon burst: mornings are often clear. The coast is wetter than inland: Koh Rong peaks near 520 mm in September versus 318 mm for Siem Reap in September.
- How hot does Cambodia get?
- Daytime highs sit around 30–35°C most of the year, peaking in April before the rains. Humidity, not the thermometer, is what most visitors feel: plan outdoor sightseeing for the morning and rest at midday.
Plan around it
Weather is only half the picture: pair it with the crowds and the festival calendar.
Local advice for your Cambodia trip.
Practical guides, itinerary ideas and tips from our team in Cambodia.