August · Cambodia
Best time to visit Siem Reap in August Weather, crowds & prices
Weather in Siem Reap in August
Average temperature 28°C, 247 mm of rain, about 26 days with 6+ hours of sunshine and 84% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
3.3/10
Ranked #10 of 12 months
- Avg temp
- 28°C
- Rainfall
- 247 mm
- Humidity
- 84%
- Days with 6h+ sun
- 26
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
August in Siem Reap scores 3.3/10 for sightseeing and cultural travel - ranked #10 of 12. Expect around 28°C, 247 mm of rain, and roughly 26 days with 6+ hours of sunshine this month.
Siem Reap is the base for Angkor's temples, with a river town of markets and cafés beside it.
August in Siem Reap: expect compromises
Days in August average 28°C (82°F) and humidity near 84% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
This is the year's wettest stretch at 247 mm, but with about 26 days with 6+ hours of sunshine it is not a total loss; an indoor fallback covers the risk.
That is 3.3/10 on the same scale — 10th of 12 months, versus 8.4/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for low-season pricing, and crowds are light for this destination.
If your dates are flexible, December is materially better in Siem Reap — 5.1 points higher on the same scale.
Frequently asked
- What is the weather like in Siem Reap in August?
- In August, Siem Reap averages 28°C, 247 mm of rain, and about 26 days with 6+ hours of sunshine. Its climate-comfort score is 3.3/10.
- Is August a good time to visit Siem Reap?
- August earns a 3.3/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Siem Reap in August?
- Expect about 247 mm of rain in August. Average humidity is 84% and there are about 26 days with 6+ hours of sunshine.
Curated in Siem Reap
Tickets & experiences
Things to do in Siem Reap
Siem Reap, Cambodia. Live activities and tours from GetYourGuide, matched to this destination.