Historical data suggests significant rain risk (76%) on September 27. If you seek sun, consider a different date. Bring rain gear!
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Essential Travel Info for Siem Reap
Currency
KHR
៛ Cambodian riel
Language
Khmer
Driving
Right side
Connect
Wifi is available in all the usual place...
Safety
High Safety
GPI: 1.882
Siem Reap Weather Forecast for September 27
"Rainy & Overcast. Expect average highs of 30.2°C. 76% chance of rain."
What to Wear in Siem Reap in September
Based on historical data for September 27, Siem Reap typically experiences temperatures between 24.3°C and 30.2°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 76% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Siem Reap
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
30.2°C
Daytime Peak
Average Low
24.3°C
Nighttime Low
Feels Like
40.5°C
🔥 Heat index effect
Rain Chance
76%
Avg 7.7mm if it rains
Cloud Cover
87%
Moderate rain
Pressure
1008.3 hPa
Low volatility
Siem Reap Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 96% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 35 min to burn
Type III-IV
🟡 53 min to burn
Type V-VI
🟢 88 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
27.8°C
Humid/Sticky
Heat Index
40.5°C
Feels hotter
😕 Best outdoor time:
Early morning (6-9 AM) or evening (after 6 PM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Cambodia
Flight Traffic
N/A
0/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
N/A
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Siem Reap
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:55
☀️ Noon
11:57
🌇 Sunset
17:59
⏱️ Daylight
12h 4m
Wind Speed
10 km/h
Light breeze
Sunshine
7.7 hrs
Direct Sun (Cloud-free)
Humidity
87%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Siem Reap
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Siem Reap
Travel Comfort Index
Real-time tourism conditions
Weather Quality
🌧️ Variable
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Siem Reap on September 27 averages 30.2°C with a 76% precipitation probability. Wedding/Outdoor Event Score: 49/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Siem Reap Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 27) in other destinations
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📍 Is Siem Reap Worth Visiting on September 27?
Planning a trip to Siem Reap on September 27? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 30.2°C with a 76% historical precipitation risk.
💉 Health Advisory: 10 vaccinations are recommended for Cambodia, including COVID-19.
📊 Historical Extremes: The hottest September 27 recorded in the last 30 years saw temperatures hit 32°C in 2018, while the coldest dropped to 23.6°C in 2023.