Busan vs Jeju

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Busan edges ahead as the better destination in December. Busan offers 8 hours of daily sunshine with only 3 rain days, while Jeju sees 6 sunshine hours and 8 rain days.

Busan is on the cooler side at 8°C, requiring warmer clothing. Jeju is cooler at 10°C.

For travelers who prioritize dry weather, Busan is the stronger choice in December. Busan receives 2 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

Busan reaches an average high of 8°C (46°F) and drops to 2°C (36°F) at night during December. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.

Jeju averages 10°C (50°F) for the high and 6°C (43°F) for the low, with a daily range of 4°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 December.

Busan receives approximately 28 mm of rainfall across 3 rain days during December. Rain is occasional, so a light rain jacket should suffice.

Jeju sees 59 mm over 8 rain days. That makes Busan the drier option by 5 rain days and 31 mm of total precipitation.

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