South Korea Jeju Island Weather in December — Climate Guide
December in Jeju Island is high
December is high for Jeju Island.
Cool but mild maritime winter. Camellia Hill peak. Hallasan snow trail magical. Less snow than mainland.
Travel score
Jeju Island December Weather Stats
Avg High
11°C
Avg Low
5°C
Rainy Days
7
50mm total
Sunshine
6h
Daily avg
Humidity
60%
moderate
UV Index
2
Low
Wind
11 km/h
Gusts 30
Sea Temp
16°C
no swimming
Crowds
Moderate
At attractions
December Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
25 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
9°C
Nighttime
3°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 30 km/h
Activities Recommended for December
December Travel Pros & Cons
Pros
- Camellia Hill peak
- Hallasan snow magical
- Mild maritime winter
- Hotels moderate
Cons
- 5-11°C cool
- Daylight 10h
- Beach impossible
December Events & Festivals
- Christmas + New Year
- Camellia peak
Jeju Island in December — Full Picture
Cool but mild maritime winter. Camellia Hill peak. Hallasan snow trail magical. Less snow than mainland.
What to Wear & What to Pack
Cool maritime winter. Warm coat + scarf.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
16.7°C
9.7°C
9/mo
Summer (Jun·Jul·Aug)
27°C
21.3°C
11.7/mo
Autumn (Sep·Oct·Nov)
21.7°C
14.3°C
7.7/mo
Winter (Dec·Jan·Feb)
Current9.3°C
3.3°C
7.7/mo
Jeju Island Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| 8° | 2° | 8d·60mm | 5h | 65% | 2 | Quiet | Low season | |
| 9° | 3° | 8d·65mm | 6h | 68% | 3 | Quiet | Low season | |
| 12° | 5° | 9d·90mm | 7h | 70% | 5 | Moderate | Shoulder | |
| April (Best) | 17° | 10° | 9d·100mm | 8h | 70% | 6 | Very busy | Peak |
| May (Best) | 21° | 14° | 9d·100mm | 9h | 75% | 7 | Very busy | Peak |
| 24° | 18° | 11d·200mm | 6h | 80% | 8 | Moderate | Shoulder | |
| 28° | 22° | 13d·280mm | 6h | 80% | 9 | Busy | Peak | |
| 29° | 24° | 11d·200mm | 7h | 78% | 10 | Very busy | Peak | |
| 26° | 19° | 9d·200mm | 7h | 75% | 7 | Busy | Peak | |
| October (Best) | 22° | 14° | 7d·100mm | 8h | 65% | 5 | Very busy | Peak |
| November (Best) | 17° | 10° | 7d·80mm | 7h | 60% | 3 | Busy | Peak |
| 11° | 5° | 7d·50mm | 6h | 60% | 2 | Moderate | Shoulder |
View Other Months
Jeju Island December Hotel Picks
Frequently Asked Questions
Is December a good time to visit Jeju Island?
Jeju Island in December is high. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Jeju Island in December?
Jeju Island December averages a high of 11°C and a low of 5°C.
Does it rain much in Jeju Island in December?
Jeju Island December averages 50mm of rainfall over about 7 rainy days.
What should I wear in Jeju Island in December?
Cool maritime winter. Warm coat + scarf.
What time are sunrise and sunset in Jeju Island in December?
Jeju Island December sunrise is 07:35 and sunset is 17:25, with 9h 50min of daylight.
What's the air quality like in Jeju Island in December?
Jeju Island December air quality (AQI) averages 40, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Jeju Island in December?
In December, Jeju Island is great for Camellia Hill, Hallasan snow trail, Manjanggul.
Is December peak season in Jeju Island?
Jeju Island December crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Jeju Island
View Other Months
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.