South Korea Jeju Island Weather in January — Climate Guide
January in Jeju Island is moderate
January is moderate for Jeju Island.
Cool maritime winter — Camellia Hill peak + Hallasan snow trail. Less crowded + hotels affordable.
Travel score
Jeju Island January Weather Stats
Avg High
8°C
Avg Low
2°C
Rainy Days
8
60mm total
Sunshine
5h
Daily avg
Humidity
65%
moderate
UV Index
2
Low
Wind
11 km/h
Gusts 30
Sea Temp
14°C
no swimming
Crowds
Quiet
At attractions
January Sunrise & Sunset
Air Quality
PM2.5
14 μg/m³
PM10
25 μg/m³
Status
good
Feels-Like Temperature & Wind
Feels like
Daytime
6°C
Nighttime
0°C
Humidity and wind affect how the actual temperature feels.
Wind
11 km/h
Max gust 30 km/h
Activities Recommended for January
January Travel Pros & Cons
Pros
- Camellia Hill peak
- Hallasan snow + winter trail
- Hotels 30-50% off summer
- Less crowded
Cons
- 2-8°C cool
- Daylight 10h
- Hallasan summit access weather-dependent
January Events & Festivals
- Camellia season peak
- Hallasan snow magical
Jeju Island in January — Full Picture
Cool maritime winter — Camellia Hill peak + Hallasan snow trail. Less crowded + hotels affordable.
What to Wear & What to Pack
Cool maritime winter. Warm coat + scarf + thermal layers.
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 January Hotel Picks
Frequently Asked Questions
Is January a good time to visit Jeju Island?
Jeju Island in January is moderate. Tourist crowds are quiet and flight/hotel prices are low season.
What's the average temperature in Jeju Island in January?
Jeju Island January averages a high of 8°C and a low of 2°C.
Does it rain much in Jeju Island in January?
Jeju Island January averages 60mm of rainfall over about 8 rainy days.
What should I wear in Jeju Island in January?
Cool maritime winter. Warm coat + scarf + thermal layers.
What time are sunrise and sunset in Jeju Island in January?
Jeju Island January sunrise is 07:30 and sunset is 17:35, with 10h 5min of daylight.
What's the air quality like in Jeju Island in January?
Jeju Island January air quality (AQI) averages 40, rated Good. PM2.5 averages 14μg/m³.
What activities are recommended in Jeju Island in January?
In January, Jeju Island is great for Camellia Hill, Hallasan winter trail (Eorimok/Yeongsil), Manjanggul Lava Tube.
Is January peak season in Jeju Island?
Jeju Island January crowds are quiet and prices are low season. 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.