Seoul vs Jeju

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.

Seoul sits in the comfortable travel range at 22°C. Jeju is also comfortable at 20°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.

Seoul reaches an average high of 22°C (72°F) and drops to 12°C (54°F) at night during May. The daily temperature range is 10°C, meaning moderate variation throughout the day.

Jeju averages 20°C (68°F) for the high and 15°C (59°F) for the low, with a daily range of 5°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.

Seoul receives approximately 95 mm of rainfall across 8 rain days during May. You can expect rain roughly every other day.

Jeju sees 129 mm over 10 rain days. That makes Seoul the drier option by 2 rain days and 34 mm of total precipitation.

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