March 21 is statistically one of the best days of the year in Seoul. With minimal rain risk (13%) and pleasant highs of 12°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 March 21
"Mild & Comfortable. Expect average highs of 12.3°C. 13% chance of snow."
What to Wear in Seoul in March
Based on historical data for March 21, Seoul typically experiences temperatures between 0.9°C and 12.3°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (13% 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
12.3°C
Daytime Peak
Average Low
0.9°C
Nighttime Low
Feels Like
11.4°C
🌤️ Feels accurate
Snow Chance
13%
Avg 0.6mm if it snows
Snowfall
0.1 cm
~13% chance
Pressure
1017.3 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 30 recommended
06:00 - 10:00
16:00 - 18:00
Type I-II
🔴 26 min to burn
Type III-IV
🟡 39 min to burn
Type V-VI
🟢 65 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
5.7°C
Dry air
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Korea
Flight Traffic
Moderate
47/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~542
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Seoul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:36
☀️ Noon
12:40
🌇 Sunset
18:45
⏱️ Daylight
12h 8m
Wind Speed
16 km/h
Gentle breeze
Sunshine
9.4 hrs
Direct Sun (Cloud-free)
Humidity
64%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Seoul
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
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.
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 March 21 averages 12.3°C with a 13% precipitation probability. Wedding/Outdoor Event Score: 80/100."
— 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
March 24
13.2°C • 14% rain
Score
85
March 25
13.1°C • 15% rain
Score
84
March 23
13°C • 13% rain
Score
83
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (March 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Seoul Worth Visiting on March 21?
Planning a trip to Seoul on March 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 12.3°C with a 13% historical precipitation risk.
✈️ Travel Logistics: Approximately 542 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 March 21 recorded in the last 30 years saw temperatures hit 18.5°C in 2023, while the coldest dropped to -3.3°C in 2022.