2026 Climate Averages

Weather: Jeju Island — December

Conditions are pleasant for sightseeing, though you might encounter occasional showers.

👍 Climate Overview

December is a good time to visit Jeju Island. Mild temperatures around 11°C make it comfortable for exploring. With only around 10 hours of daylight, plan outdoor activities earlier in the day. Being off-peak, you'll find better deals and fewer crowds. At 18°C, the sea is too cold for most swimmers.

7.1
GoTripzi Score Great

Based on weather comfort, crowds, prices, and activity options

Avg High

11°C

Avg Low

7°C

Rainy days

7days

Daylight

9.9h

Feels like 8°C / 2°C — wind chill makes it feel cooler

Rainfall

31mm

Sunshine

5.8h/day

Humidity

68%

Humid
Sun Strength

3

Moderate
Wind

22 km/h (gusts 46)

Sea Temp

18°C ❄️ Cold

Is December a good time to visit Jeju Island?

Conditions are pleasant for sightseeing, though you might encounter occasional showers.

Now

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Feels like --
Wind --
Humidity --
UV Index --
Local time —

Air Quality

Travel Context

  • Crowds
    Quiet
  • Travel Costs Value Rates

Daylight

Sunrise

07:31

Sunset

17:28

9.9h daylight

Visiting Jeju Island in December: Pros & Cons

Pros

  • Fewer crowds and better hotel deals

Things to Do in December

Recommended for This Weather

🥾 Hiking & nature trails
🍜 Food tours & culinary experiences
🎭 Cultural tours & local experiences

Jeju Island Weather by Month

Month Avg High Avg Low Rain Sunshine Humidity UV Index Crowds Condition
Jan 10°C 5°C 9d (59mm) 5.7h
70% Humid
3.3 Moderate
Good
Feb 10°C 6°C 9d (79mm) 6.3h
71% Humid
4.4 Moderate
Good
Mar 14°C 9°C 10d (98mm) 7.6h
72% Humid
6.2 High
Good
Apr 18°C 12°C 8d (93mm) 8.9h
72% Humid
7.8 Very High
Excellent
May 21°C 16°C 9d (129mm) 9.2h
77% Humid
8.2 Very High
Excellent
Jun 25°C 21°C 13d (213mm) 8h
85% Very Humid
7.2 Very High
Wet
Jul 29°C 25°C 18d (254mm) 8.4h
87% Very Muggy
6.8 High
Wet
Aug 30°C 26°C 19d (177mm) 9.9h
83% Very Muggy
7.1 Very High
Wet
Sep 28°C 24°C 17d (275mm) 7.9h
81% Very Humid
5.6 High
Excellent
Oct 22°C 18°C 7d (48mm) 8.2h
72% Humid
5.2 High
Excellent
Nov 17°C 13°C 7d (97mm) 6.9h
70% Humid
3.9 Moderate
Good
Dec Current 11°C 7°C 7d (31mm) 5.8h
68% Humid
3 Moderate
Good

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Where to Stay

See hotels, apartments & rentals around Jeju Island – live prices from Booking.com, Expedia, Vrbo and more

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Jeju Island

Volcanic island, including waterfalls, Hallasan Mountain hike and Seongsan Sunrise Peak, lava tubes, beaches, and Hallasan crater.

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What to Pack for December

Bundle up with a warm coat, scarf, and closed-toe shoes. Thermal layers underneath give flexibility as you move between indoors and outdoors. Pack a compact umbrella or light rain jacket for occasional showers.

Warm Quiet

🎒Personalized Packing List

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📋Essentials
👕Clothing
👟Footwear
🎒Accessories
🧴Toiletries & Health

Planning a trip to Jeju Island?

💰 Off-peak — great deals available now

Frequently Asked Questions

Is December a good time to visit Jeju Island?
December is typically good for visiting Jeju Island, with average highs of 11°C and around 7 rainy days. Plan your activities accordingly—outdoor sightseeing is best on dry days, while rainy days are perfect for museums and indoor attractions.
Does it get cold at night in Jeju Island in December?
Nights in Jeju Island during December are cool at around 7°C. Bring a jacket or sweater for evenings, especially if you plan to dine outdoors or take evening walks. The temperature drop from day to night can be noticeable.
What should I pack for Jeju Island in December?
With highs of 11°C and lows of 7°C in December, we recommend: Layerable clothing, Light jacket, Compact umbrella, Comfortable walking shoes. Layering is key as temperatures can vary between air-conditioned interiors and outdoors. Comfortable walking shoes are essential for cobblestone streets.
Does it rain a lot in Jeju Island in December?
Jeju Island typically sees around 7 rainy days in December. Rain is usually in the form of brief showers rather than all-day downpours, so a compact umbrella is sufficient. Mornings tend to be drier, making them ideal for outdoor sightseeing.
Can you swim in Jeju Island in December?
Swimming in Jeju Island during December is possible but quite cold, with air temperatures around 11°C. Only brave swimmers venture in without a wetsuit. Consider indoor pools or thermal baths as an alternative if your hotel offers them.
How many hours of daylight are there in Jeju Island in December?
In December, Jeju Island gets approximately 9.9 hours of daylight per day. This affects how much sightseeing you can fit in—longer days mean more time for outdoor activities, while shorter days are perfect for cozy museum visits and early dinners.
Is December peak season in Jeju Island?
No, December is not peak season in Jeju Island. Expect better value on accommodation, shorter queues at attractions, and fewer tourists at popular spots. This is an excellent time to experience the city like a local and enjoy a more authentic atmosphere.

Weather Data: Based on 2020–2025 historical climate data from Open-Meteo

Solar calculations: SunCalc (timezone: Asia/Seoul)

Last Updated: February 2026

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