Seoul vs Busan

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

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

For travelers who prioritize dry weather, Seoul is the stronger choice in September.

Seoul reaches an average high of 25°C (77°F) and drops to 16°C (61°F) at night during September. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Busan averages 25°C (77°F) for the high and 20°C (68°F) for the low, with a daily range of 5°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.

Seoul receives approximately 123 mm of rainfall across 8 rain days during September. You can expect rain roughly every other day.

Busan sees 164 mm over 10 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%.