Cambodia Siem Reap Weather in August — Climate Guide
August in Siem Reap is moderate
August is moderate for Siem Reap.
August continues July's monsoon-peak pattern — 16 rainy days, 225mm rainfall, 33°C / 91°F highs. European school holidays continue through mid-August, then thin out. Korean summer break ends mid-August.
Last month before Pchum Ben festival approach (September). Late August has the year's last shoulder window before the busy season returns in November.
Travel score
Monsoon continues — late August best shoulder pricing window
August Weather at a Glance
August averages 33°C / 91°F highs and 25°C / 77°F lows with 16 rainy days and 225mm rainfall. Humidity 80%. Sunrise 6:00 AM, sunset 6:20 PM. Afternoon thunderstorms 14:00-17:00 standard.
August Travel Advice
Late August (after Aug 20) is the year's last shoulder window before September Pchum Ben + October crowds + November peak. Pre-dawn Angkor + morning sequence + pool afternoon + Phare Circus evening.
Flying In from Overseas
European summer-break tail + Korean break ends mid-August. Direct flights from Bangkok $40-100, Singapore $100-220.
August Pricing Trends
Late summer moderate: Raffles $200-450/night, Park Hyatt $250-450, FCC Angkor $100-200, Onederz $10-20.
Siem Reap August Weather Stats
Avg High
33°C
Avg Low
25°C
Rainy Days
16
225mm total
Sunshine
6h
Daily avg
Humidity
80%
high
UV Index
10
Very high
Wind
8 km/h
Gusts 25
Sea Temp
0°C
no swimming
Crowds
Moderate
At attractions
August Sunrise & Sunset
Air Quality
PM2.5
22 μg/m³
PM10
38 μg/m³
Status
moderate
Feels-Like Temperature & Wind
Feels like
Daytime
37°C
Nighttime
27°C
Humidity and wind affect how the actual temperature feels.
Wind
8 km/h
Max gust 25 km/h
Activities Recommended for August
August Travel Pros & Cons
Pros
- Lush green Angkor + monsoon atmosphere
- Late August shoulder pricing window
- Tonle Sap peak boat season continues
Cons
- Monsoon continues (225mm)
- Tourist crowds mid-August (European summer)
- High humidity 80%
August Events & Festivals
- European + Korean summer break tail
- Monsoon continues
Siem Reap in August — Full Picture
August continues July's monsoon-peak pattern — 16 rainy days, 225mm rainfall, 33°C / 91°F highs. European school holidays continue through mid-August, then thin out. Korean summer break ends mid-August.
Last month before Pchum Ben festival approach (September). Late August has the year's last shoulder window before the busy season returns in November.
What to Wear & What to Pack
Monsoon continues — same as July. Quick-dry, rain jacket, insect repellent.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
35.7°C
24.3°C
6.7/mo
Summer (Jun·Jul·Aug)
Current33.3°C
25°C
15/mo
Autumn (Sep·Oct·Nov)
31.7°C
23.3°C
13.7/mo
Winter (Dec·Jan·Feb)
32°C
21°C
1.3/mo
Siem Reap Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| January (Best) | 32° | 21° | 1d·10mm | 9h | 60% | 10 | Very busy | Peak |
| February (Best) | 33° | 21° | 1d·5mm | 10h | 55% | 10 | Very busy | Peak |
| March (Best) | 35° | 23° | 3d·25mm | 9h | 55% | 11 | Busy | Shoulder |
| 37° | 25° | 4d·50mm | 9h | 60% | 11 | Moderate | Shoulder | |
| 35° | 25° | 13d·175mm | 7h | 75% | 11 | Quiet | Low season | |
| 34° | 25° | 14d·175mm | 6h | 80% | 11 | Moderate | Low season | |
| 33° | 25° | 15d·200mm | 6h | 80% | 10 | Moderate | Shoulder | |
| 33° | 25° | 16d·225mm | 6h | 80% | 10 | Moderate | Shoulder | |
| 32° | 24° | 18d·275mm | 5h | 85% | 10 | Quiet | Low season | |
| 32° | 24° | 16d·230mm | 6h | 80% | 9 | Moderate | Low season | |
| November (Best) | 31° | 22° | 7d·70mm | 7h | 70% | 9 | Busy | Shoulder |
| December (Best) | 31° | 21° | 2d·15mm | 9h | 60% | 9 | Very busy | Peak |
View Other Months
Siem Reap August Hotel Picks
Frequently Asked Questions
Is August a good time to visit Siem Reap?
Siem Reap in August is moderate. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Siem Reap in August?
Siem Reap August averages a high of 33°C and a low of 25°C.
Does it rain much in Siem Reap in August?
Siem Reap August averages 225mm of rainfall over about 16 rainy days.
What should I wear in Siem Reap in August?
Monsoon continues — same as July. Quick-dry, rain jacket, insect repellent.
What time are sunrise and sunset in Siem Reap in August?
Siem Reap August sunrise is 06:00 and sunset is 18:20, with 12h 20min of daylight.
What's the air quality like in Siem Reap in August?
Siem Reap August air quality (AQI) averages 60, rated Moderate. PM2.5 averages 22μg/m³.
What activities are recommended in Siem Reap in August?
In August, Siem Reap is great for Pre-dawn Angkor, Tonle Sap boat, Khmer cooking class.
Is August peak season in Siem Reap?
Siem Reap August crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Siem Reap
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.