December 31 is statistically one of the best days of the year in Hanoi. With minimal rain risk (8%) and pleasant highs of 21°C, it's ideal for outdoor adventures. Hanoi is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Hanoi
Currency
VND
₫ Vietnamese đồng
Language
Vietnamese
Driving
Right side
Connect
Most regular restaurants and cafés have ...
Safety
High Safety
GPI: 1.786
Hanoi Weather Forecast for December 31
"Mild & Comfortable. Expect average highs of 20.5°C. 8% chance of rain."
What to Wear in Hanoi in December
Based on historical data for December 31, Hanoi typically experiences temperatures between 13.4°C and 20.5°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (8% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Hanoi
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.5°C
Daytime Peak
Average Low
13.4°C
Nighttime Low
Feels Like
20.6°C
☀️ Feels accurate
Rain Chance
8%
Avg 0.4mm if it rains
Cloud Cover
67%
Overcast
Pressure
1020.7 hPa
Low volatility
Hanoi Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 81% 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
15.3°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Vietnam
Flight Traffic
High
90/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~265
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hanoi
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:34
☀️ Noon
12:00
🌇 Sunset
17:26
⏱️ Daylight
10h 52m
Wind Speed
10.8 km/h
Light breeze
Sunshine
5.1 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hanoi
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Hanoi
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.
High pressure may reduce activity.
Unhealthy. Everyone should reduce outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Hanoi on December 31 averages 20.5°C with a 8% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hanoi Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (December 31) in other destinations
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📍 Is Hanoi Worth Visiting on December 31?
Planning a trip to Hanoi on December 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 20.5°C with a 8% historical precipitation risk.
✈️ Travel Logistics: Approximately 265 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for Vietnam, including COVID-19.
📊 Historical Extremes: The hottest December 31 recorded in the last 30 years saw temperatures hit 26.8°C in 2023, while the coldest dropped to 7°C in 2018.