September 9 is generally a great time to visit Seoul. While there is a slight chance of rain (19%), showers are usually brief. Expect comfortable 26°C weather. Expect a bustling atmosphere in Seoul right now—this is when the city truly comes alive with visitors.
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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 September 9
"Warm & Sunny. Expect average highs of 26.4°C. 19% chance of rain."
What to Wear in Seoul in September
Based on historical data for September 9, Seoul typically experiences temperatures between 18.5°C and 26.4°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (19% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Seoul
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
26.4°C
Daytime Peak
Average Low
18.5°C
Nighttime Low
Feels Like
27.6°C
☀️ Minor difference
Rain Chance
19%
Avg 1.8mm if it rains
Cloud Cover
62%
Overcast
Pressure
1012.9 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 96% 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
🔴 30 min to burn
Type III-IV
🟡 45 min to burn
Type V-VI
🟢 75 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
22.5°C
Humid/Sticky
Heat Stress
Low
No heat warning
😐 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Korea
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~1,054
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seoul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:09
☀️ Noon
12:31
🌇 Sunset
18:52
⏱️ Daylight
12h 42m
Wind Speed
10.9 km/h
Light breeze
Sunshine
8.4 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
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.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
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 September 9 averages 26.4°C with a 19% precipitation probability. Wedding/Outdoor Event Score: 97/100."
— 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
Compare Other Cities
Same date (September 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seoul Worth Visiting on September 9?
Planning a trip to Seoul on September 9? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 26.4°C with a 19% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,054 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 September 9 recorded in the last 30 years saw temperatures hit 31.4°C in 2024, while the coldest dropped to 13.6°C in 2018.