October 21 is statistically one of the best days of the year in Busan. With minimal rain risk (14%) and pleasant highs of 20°C, it's ideal for outdoor adventures. Busan is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Busan
Currency
KRW
₩ South Korean won
Language
Korean
Driving
Right side
Safety
High Safety
GPI: 1.779
Busan Weather Forecast for October 21
"Mild & Comfortable. Expect average highs of 20°C. 14% chance of rain."
What to Wear in Busan in October
Based on historical data for October 21, Busan typically experiences temperatures between 13.1°C and 20°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (14% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Busan
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20°C
Daytime Peak
Average Low
13.1°C
Nighttime Low
Feels Like
20°C
☀️ Feels accurate
Rain Chance
14%
Avg 0.7mm if it rains
Cloud Cover
51%
Overcast
Pressure
1019.9 hPa
Medium volatility
Busan Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 97% 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
🔴 50 min to burn
Type III-IV
🟡 75 min to burn
Type V-VI
🟢 125 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.6°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in South Korea
Flight Traffic
High
85/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~142
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Busan
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:35
☀️ Noon
12:09
🌇 Sunset
17:43
⏱️ Daylight
11h 8m
Wind Speed
16.8 km/h
Gentle breeze
Sunshine
7.8 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Busan
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Busan
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
Typhoon Risk
Year-round risk present
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Busan on October 21 averages 20°C with a 14% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Busan Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (October 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Busan Worth Visiting on October 21?
Planning a trip to Busan on October 21? 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°C with a 14% historical precipitation risk.
✈️ Travel Logistics: Approximately 142 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 10 vaccinations are recommended for South Korea, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 22.2°C (swimming pool). Wave conditions are generally fun waves with heights around 0.86m.
📊 Historical Extremes: The hottest October 21 recorded in the last 30 years saw temperatures hit 22.5°C in 2024, while the coldest dropped to 7.5°C in 2023.