Jeju vs Busan

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

Jeju sits in the comfortable travel range at 20°C. Busan is also comfortable at 21°C.

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

Jeju reaches an average high of 20°C (68°F) and drops to 15°C (59°F) at night during May. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Busan averages 21°C (70°F) for the high and 14°C (57°F) for the low, with a daily range of 7°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 May.

Jeju receives approximately 129 mm of rainfall across 10 rain days during May. You can expect rain roughly every other day.

Busan sees 117 mm over 8 rain days. That makes Busan the drier option by 2 rain days and 12 mm of total precipitation.

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