Siem Reap Weather in August
What's the weather like in Siem Reap (Siem Reap) in August 2025?
The climate in Siem Reap during August can be summarized as hot, humid and very wet.
August is in the summer in Siem Reap and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 24°C (75°F) is normal.
| Daytime temperature | 31.8°C 89.2°F |
|---|---|
| Nightly temperature | 24°C 75.2°F |
| Average temperature | 27.9°C 82.2°F |
| Daily sunshine | 5.7 hrs |
| Avg rainfall | 224 mm 8.8 ins |
| Rainy days | 18 days |
| Sea temperature | 29.2°C 84.5°F |
| Humidity | 84% |
| Windspeed | 6.5kph 4 mph |
On average August is the 2nd wettest month of the year in Siem Reap with around 224mm 8.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 18 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.7 hours of sunshine per day.
August temperatures in Siem Reap
August rainfall
August hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Siem Reap in August 2025.
Other monthly averages
Best places to visit in August
Siem Reap weather stats
| Hottest month: | April | 35.7°C 96.3°F |
|---|---|---|
| Driest month: | January | 1mm 0ins |
| Sunniest month: | January | 9.6hrs |
| Coldest month: | December | 30.1°C 86.2°F |
| Wettest month: | September | 250mm 9.8ins |
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