January 9 is statistically one of the best days of the year in Seoul. With minimal rain risk (4%) and pleasant highs of 1°C, it's ideal for outdoor adventures. You'll enjoy Seoul with reasonable crowd levels and competitive accommodation options.
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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 January 9
"Cold & Crisp. Expect average highs of 0.8°C. 4% chance of snow."
What to Wear in Seoul in January
Based on historical data for January 9, Seoul typically experiences temperatures between -7.7°C and 0.8°C. We recommend packing heavy coat, scarf, gloves 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 Seoul
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
0.8°C
Daytime Peak
Average Low
-7.7°C
Nighttime Low
Feels Like
-3.2°C
🥶 Slightly colder
Snow Chance
4%
Avg 0.1mm if it snows
Snowfall
0.3 cm
~4% chance
Pressure
1024.7 hPa
Medium volatility
Seoul Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 79% 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
🔴 160 min to burn
Type III-IV
🟡 240 min to burn
Type V-VI
🟢 400 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
-6.1°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
49/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~561
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seoul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:48
☀️ Noon
12:40
🌇 Sunset
17:31
⏱️ Daylight
9h 43m
Wind Speed
14 km/h
Gentle breeze
Sunshine
7.6 hrs
Direct Sun (Cloud-free)
Humidity
60%
Slightly humid
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
🟢 Moderate
Price Level
💰💰 Moderate
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 January 9 averages 0.8°C with a 4% precipitation probability. Wedding/Outdoor Event Score: 21/100."
— 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
January 3
2°C • 5% rain
Score
28
January 4
1.8°C • 8% rain
Score
28
January 15
1.9°C • 11% rain
Score
28
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seoul Worth Visiting on January 9?
Planning a trip to Seoul on January 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 0.8°C with a 4% historical precipitation risk.
✈️ Travel Logistics: Approximately 561 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 January 9 recorded in the last 30 years saw temperatures hit 5.3°C in 2023, while the coldest dropped to -15.2°C in 2021.