Busan vs Jeju

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Busan edges ahead as the better destination in September. Busan offers 8 hours of daily sunshine with only 10 rain days, while Jeju sees 8 sunshine hours and 13 rain days.

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

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

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.

Jeju averages 25°C (77°F) for the high and 22°C (72°F) for the low, with a daily range of 3°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.

Jeju sees 188 mm over 13 rain days. That makes Busan the drier option by 3 rain days and 24 mm of total precipitation.

Humidity also differs: Busan averages 65% while Jeju sits at 70%. Jeju will feel muggier, especially at higher temperatures.