Jeju Weather in December: What to Expect
In December, Jeju averages highs of 9.8°C and lows of 5.2°C, with about 13 rainy days (~85 mm). Verdict: Wet season — plan around rain — ~13 rainy days this month. That makes it the hottest of South Korea's 6 main cities this month.
Jeju vs other South Korea cities in December
South Korea is not one climate. In December, Jeju runs to 9.8°C while Seoul sits at 3.2°C — a 7°C spread. Here is where Jeju falls:
What to pack for Jeju in December
With highs near 9.8°C and lows around 5.2°C, pack warm layers, a proper jacket, and closed shoes, a warm fleece or down layer for cold nights, a compact umbrella or rain shell.
Jeju is on the coast — add swimwear; the water can feel cool for swimming this month.
What to do in Jeju in December
With 9.8°C midday highs, start outdoor sights early and keep afternoons for shaded or indoor stops. Top sights:
Public holidays in South Korea, December
- 2026-12-25 — Christmas Day
- 2027-12-25 — Christmas Day
Jeju in December — FAQs
What is the weather like in Jeju in December?
In December, Jeju averages daytime highs of 9.8°C and overnight lows around 5.2°C, with roughly 13 rainy days and about 85 mm of rain across the month. Wet season — plan around rain — ~13 rainy days this month.
Is December a good time to visit Jeju?
Wet season — plan around rain. Plan outdoor sights for early morning and keep midday for indoor or shaded activities. Among South Korea's cities, Jeju is the hottest this month.
What should I pack for Jeju in December?
For December (5.2–9.8°C), pack warm layers, a proper jacket, and closed shoes, a warm fleece or down layer for cold nights, a compact umbrella or rain shell.
What is there to do in Jeju in December?
Jeju's main sights include Jeju Volcanic Island and Lava Tubes, Hallasan National Park, Dadohaehaesang National Park. Time outdoor sites for early morning given the midday heat.
Are there public holidays in South Korea in December?
Yes — Christmas Day (2026-12-25), Christmas Day (2027-12-25). Sites can be busier or closed around these dates.
Jeju weather by month: