Busan vs Seoul

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in September. Seoul offers 9 hours of daily sunshine with only 8 rain days, while Busan sees 8 sunshine hours and 10 rain days.

Busan sits in the comfortable travel range at 25°C. Seoul is also comfortable at 25°C.

For travelers who prioritize dry weather, Seoul is the stronger choice in September. Seoul receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Busan reaches an average high of 25°C (77°F) and drops to 20°C (68°F) at night during September. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Seoul averages 25°C (77°F) for the high and 16°C (61°F) for the low, with a daily range of 9°C. The two cities feel quite similar in terms of temperature.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.

Busan receives approximately 164 mm of rainfall across 10 rain days during September. You can expect rain roughly every other day.

Seoul sees 123 mm over 8 rain days. That makes Seoul the drier option by 2 rain days and 41 mm of total precipitation.

Both cities share similar humidity levels at 65%.