Jeju vs Seoul

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in May. Seoul 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. Seoul is also comfortable at 22°C.

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

Seoul averages 22°C (72°F) for the high and 12°C (54°F) for the low, with a daily range of 10°C. The 2°C difference is noticeable but not dramatic.

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.

Seoul sees 95 mm over 8 rain days. That makes Seoul the drier option by 2 rain days and 34 mm of total precipitation.

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