Jeju Island in December
In December, Jeju Island averages 10°C (49°F) during the day and 5°C (42°F) at night, with frequent rain — about 14 days of the month see precipitation (85 mm total).
ShoulderConditions are cold — pack winter layers. Plan for unsettled weather and bring rain gear.
December is one of the wetter and less comfortable months in Jeju Island. If your dates are flexible, consider a different time of year.
How December compares to the rest of the year in Jeju Island
December is one of the coolest months in Jeju Island (10th of 12) and moderately rainy compared to the rest of the year (5th of 12). Daytime temperature runs 9°C below the annual average (18°C). December runs 6°C cooler than November (15°C) and cools 2°C in January (8°C).
December sunrise & sunset in Jeju Island
Times shown for Jeju Island local time (Asia/Seoul), calculated for the 15th of December. They shift by a few minutes day to day across the month.
Photography light in Jeju Island — December
Golden-hour and blue-hour windows for the 15th of December, in Jeju Island's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Jeju Island in December
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on December's tier (Shoulder) and Jeju Island's popularity.
Crowds & pricing — December in Jeju Island
Jeju Island is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: Christmas / New Year travel surge
Sun & mosquito risk — December in Jeju Island
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Jeju Island in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 8°C / 46°F | 3°C / 38°F | 90 mm | 11 | — |
| February | 8°C / 47°F | 4°C / 38°F | 73 mm | 10 | — |
| March | 13°C / 55°F | 7°C / 45°F | 112 mm | 10 | — |
| April | 17°C / 62°F | 11°C / 52°F | 130 mm | 10 | — |
| May | 21°C / 71°F | 16°C / 60°F | 147 mm | 10 | — |
| June | 24°C / 76°F | 20°C / 67°F | 206 mm | 14 | — |
| July | 28°C / 83°F | 24°C / 75°F | 253 mm | 18 | — |
| August | 29°C / 84°F | 25°C / 77°F | 269 mm | 18 | — |
| September | 25°C / 77°F | 22°C / 71°F | 359 mm | 17 | — |
| October | 20°C / 69°F | 16°C / 61°F | 152 mm | 10 | — |
| November | 15°C / 60°F | 11°C / 51°F | 88 mm | 11 | — |
| December | 10°C / 49°F | 5°C / 42°F | 85 mm | 14 | — |
Other cities with similar December weather
🌍 See the full ranked list of climate twins for Jeju Island in December →
Frequently asked questions
How hot is Jeju Island in December?
In December, Jeju Island averages a high of 10°C (49°F) and a low of 5°C (42°F) — generally cool.
Does it rain a lot in Jeju Island in December?
December can be fairly wet in Jeju Island, with about 14 rainy days on average.
Is December a good time to visit Jeju Island?
December is cool but on the rainy side. It suits travelers who are comfortable with cool weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Jeju Island in December?
Pack a warm jacket and layers, plus a compact umbrella or rain jacket. See the full December packing list for Jeju Island for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.