Busan vs Jeju

Busan and Jeju are closely matched in October. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Busan is on the cooler side at 11°C, requiring warmer clothing. Jeju is also comfortable at 20°C.

For travelers who prioritize dry weather, Busan is the stronger choice in October. Jeju receives 6 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

Busan reaches an average high of 11°C (52°F) and drops to 3°C (37°F) at night during October. The daily temperature range is 8°C, meaning moderate variation throughout the day.

Jeju averages 20°C (68°F) for the high and 17°C (63°F) for the low, with a daily range of 3°C. There is a notable 9°C gap between the two cities, so expect a very different feel.

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

Busan receives approximately 40 mm of rainfall across 3 rain days during October. Rain is occasional, so a light rain jacket should suffice.

Jeju sees 92 mm over 7 rain days. That makes Busan the drier option by 4 rain days and 52 mm of total precipitation.

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