Jeju vs Seoul

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in December. Seoul offers 7 hours of daily sunshine with only 5 rain days, while Jeju sees 6 sunshine hours and 8 rain days.

Jeju is on the cooler side at 10°C, requiring warmer clothing. Seoul is cooler at 3°C.

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

Jeju reaches an average high of 10°C (50°F) and drops to 6°C (43°F) at night during December. The daily temperature range is 4°C, meaning relatively stable temperatures from day to night.

Seoul averages 3°C (37°F) for the high and -5°C (23°F) for the low, with a daily range of 8°C. There is a notable 7°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 December.

Jeju receives approximately 59 mm of rainfall across 8 rain days during December. You can expect rain roughly every other day.

Seoul sees 23 mm over 5 rain days. That makes Seoul the drier option by 3 rain days and 36 mm of total precipitation.

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