December 18 is statistically one of the best days of the year in Seoul. With minimal rain risk (6%) and pleasant highs of 2°C, it's ideal for outdoor adventures. Moderate travel demand makes this an excellent time for a balanced Seoul experience.
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Essential Travel Info for Seoul
Currency
KRW
₩ South Korean won
Language
Korean
Driving
Right side
Connect
Internet cafes known asPC bang(PC 방) (pr...
Safety
High Safety
GPI: 1.779
Seoul Weather Forecast for December 18
"Cold & Crisp. Expect average highs of 2.2°C. 6% chance of snow."
What to Wear in Seoul in December
Based on historical data for December 18, Seoul typically experiences temperatures between -6°C and 2.2°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (6% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Seoul
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
2.2°C
Daytime Peak
Average Low
-6°C
Nighttime Low
Feels Like
-1.5°C
🥶 Slightly colder
Snow Chance
6%
Avg 0.2mm if it snows
Snowfall
0.1 cm
~6% chance
Pressure
1025.7 hPa
Medium volatility
Seoul Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
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
-5°C
Dry air
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Korea
Flight Traffic
Moderate
57/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~655
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seoul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:42
☀️ Noon
12:29
🌇 Sunset
17:16
⏱️ Daylight
9h 34m
Wind Speed
13.9 km/h
Gentle breeze
Sunshine
7.4 hrs
Direct Sun (Cloud-free)
Humidity
59%
Comfortable
Travel Intelligence
Exclusive flight analytics & health data for Seoul
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Seoul
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
High pressure may reduce activity.
Unhealthy for sensitive groups. Consider wearing a mask outdoors.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Seoul on December 18 averages 2.2°C with a 6% precipitation probability. Wedding/Outdoor Event Score: 30/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Seoul Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 11
4.3°C • 12% rain
Score
41
December 12
3.8°C • 13% rain
Score
39
December 13
3.4°C • 11% rain
Score
37
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seoul Worth Visiting on December 18?
Planning a trip to Seoul on December 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 2.2°C with a 6% historical precipitation risk.
✈️ Travel Logistics: Approximately 655 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 10 vaccinations are recommended for South Korea, including COVID-19.
📊 Historical Extremes: The hottest December 18 recorded in the last 30 years saw temperatures hit 9.1°C in 2016, while the coldest dropped to -12.6°C in 2022.