December 3 is generally a great time to visit Phnom Penh. While there is a slight chance of rain (22%), showers are usually brief. Expect comfortable 31°C weather. Take advantage of the off-peak calm in Phnom Penh to see the sights without the usual crowds.
View the full calendar
Essential Travel Info for Phnom Penh
Currency
KHR
៛ Cambodian riel
Language
Khmer
Driving
Right side
Connect
Cheap SIM cards from US$2 for GSM phones...
Safety
High Safety
GPI: 1.882
Phnom Penh Weather Forecast for December 3
"Warm & Sunny. Expect average highs of 30.6°C. 22% chance of rain."
What to Wear in Phnom Penh in December
Based on historical data for December 3, Phnom Penh typically experiences temperatures between 23.4°C and 30.6°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (22% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Phnom Penh
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
30.6°C
Daytime Peak
Average Low
23.4°C
Nighttime Low
Feels Like
37.4°C
🔥 Heat index effect
Rain Chance
22%
Avg 1mm if it rains
Cloud Cover
66%
Overcast
Pressure
1010.8 hPa
Low volatility
Phnom Penh Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
25.2°C
Humid/Sticky
Heat Index
37.4°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
Quiet
29/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~17
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Phnom Penh
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:06
☀️ Noon
11:51
🌇 Sunset
17:36
⏱️ Daylight
11h 29m
Wind Speed
14.9 km/h
Gentle breeze
Sunshine
9.6 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Phnom Penh
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 Phnom Penh
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
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 excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Phnom Penh on December 3 averages 30.6°C with a 22% precipitation probability. Wedding/Outdoor Event Score: 92/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Phnom Penh Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 8
30.5°C • 12% rain
Score
99
December 9
30.5°C • 9% rain
Score
99
December 10
30.6°C • 7% rain
Score
99
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 3) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Phnom Penh Worth Visiting on December 3?
Planning a trip to Phnom Penh on December 3? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 30.6°C with a 22% historical precipitation risk.
✈️ Travel Logistics: Approximately 17 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for Cambodia, including COVID-19.
📊 Historical Extremes: The hottest December 3 recorded in the last 30 years saw temperatures hit 33.2°C in 2025, while the coldest dropped to 21.6°C in 2021.