December 20 is statistically one of the best days of the year in Phnom Penh. With minimal rain risk (4%) and pleasant highs of 30°C, it's ideal for outdoor adventures. It's a quieter period for Phnom Penh, ideal for those who prefer unhurried sightseeing.
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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 20
"Warm & Sunny. Expect average highs of 30.2°C. 4% chance of rain."
What to Wear in Phnom Penh in December
Based on historical data for December 20, Phnom Penh typically experiences temperatures between 22.7°C and 30.2°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (4% 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
30.2°C
Daytime Peak
Average Low
22.7°C
Nighttime Low
Feels Like
34.8°C
🔥 Feels warmer
Rain Chance
4%
Avg 0.2mm if it rains
Cloud Cover
65%
Overcast
Pressure
1011.7 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 92% 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
23.4°C
Humid/Sticky
Heat Index
34.8°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
06:15
☀️ Noon
11:58
🌇 Sunset
17:42
⏱️ Daylight
11h 26m
Wind Speed
17.6 km/h
Gentle breeze
Sunshine
9.4 hrs
Direct Sun (Cloud-free)
Humidity
67%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Phnom Penh
Smart Flight Estimator
Airport-to-Airport Logistics
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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.
Weather unlikely to affect joint pain.
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 20 averages 30.2°C with a 4% precipitation probability. Wedding/Outdoor Event Score: 98/100."
— 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 23
30°C • 9% rain
Score
100
December 24
30.1°C • 9% rain
Score
100
December 25
30.2°C • 8% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 20) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Phnom Penh Worth Visiting on December 20?
Planning a trip to Phnom Penh on December 20? 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 4% 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 20 recorded in the last 30 years saw temperatures hit 32.8°C in 2023, while the coldest dropped to 19°C in 2017.