A high sunrise Panorama of the Jeju Island in Jeju, South Korea
Weather in December
December comes with freezing winds and cold weather, registering lows of 5.3°C (41.5°F) in Jeju. Marking the peak of winter, snowfall periodically blankets the island, turning it into a striking white canvas. The usual hustle of outdoor activities slows down, shifting focus to indoor engagements and hot springs. Despite being the coldest month, December lights up with holiday festivities, illuminating the island with a different kind of warmth. With heavy winter garb, prepared visitors can still indulge in the tranquil allure of the island, making December a unique month on the Jeju's calendar.
Note: Swimming in 15.9°C (60.6°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
On the first day of the month, sunrise is at 07:19 and sunset at 17:25. On the last day of December, in Jeju, sunrise is at 07:37 and sunset at 17:36 KST.
Note: The daily high UV index of 3 during December translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
[Resources]Temperature
As December arrives, Jeju's weather displays a decrease in high-temperatures, transitioning from November's refreshing 16°C (60.8°F) to a fresh 11°C (51.8°F). An average low-temperature of 5.3°C (41.5°F) marks the nights in Jeju throughout December.Humidity
In Jeju, the average relative humidity in December is 65.1%.Rainfall
December is the month with the least rainfall. Rain falls for 10.8 days and accumulates 48mm (1.89") of precipitation.Sea temperature
In Jeju, in December, the average water temperature is 15.9°C (60.6°F).Note: Swimming in 15.9°C (60.6°F) does not offer a pleasant experience for most individuals. The act of controlling one's breathing becomes progressively difficult as the water temperature goes under 21°C (69.8°F).
Daylight
The month with the shortest days is December, with an average of 10h and 0min of daylight.On the first day of the month, sunrise is at 07:19 and sunset at 17:25. On the last day of December, in Jeju, sunrise is at 07:37 and sunset at 17:36 KST.
Sunshine
In Jeju, South Korea, the average sunshine in December is 2.7h.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 3 during December translates into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
What is the usual temperature for Jeju in December?
In December, the average high-temperature and low-temperature are 11°C (51.8°F) and 5.3°C (41.5°F) respectively. In August, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is computed to be 36°C (96.8°F).
What is the average humidity in December in Jeju?
In December, the average relative humidity in Jeju is 65.1%.
What is the driest month in Jeju?
The month with the least rainfall in Jeju is December, when the rain falls for 10.8 days and typically collects 48mm (1.89") of precipitation.
How much does it rain in Jeju in December?
In Jeju, during December, the rain falls for 10.8 days and regularly aggregates up to 48mm (1.89") of precipitation.
How cold is the water in December in Jeju?
In Jeju, the average seawater temperature in December is 15.9°C (60.6°F). For swimming, a surface water temperature of 15.9°C (60.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
What is the month with the shortest days in Jeju?
With an average of 10h and 0min of daylight, December has the shortest days of the year in Jeju, South Korea.
What is the average length of the day in December in Jeju?
In Jeju, the average day length in December is 9h and 59min.
When are sunrise and sunset in December in Jeju?
In December, on the first day of the month, sunrise is at 07:19 and sunset at 17:25. On the last day of the month, in Jeju, South Korea, sunrise is at 07:37 and sunset at 17:36 KST.
How many hours of sunshine does Jeju have in December?
In December, the average sunshine duration in Jeju, South Korea, is 2.7h.
What is the month with the lowest UV index in Jeju?
January and December, with an average maximum UV index of 3, are months with the lowest UV index in Jeju.
How high is the UV index in December in Jeju?
In Jeju, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average temperature in December
Jeju, South Korea
- Average high temperature in December: 11°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in December: 5.3°C
The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is January (3.2°C).
Average humidity in December
Jeju, South Korea
- Average humidity in December: 65.1%
The month with the highest relative humidity is July (78.3%).
The months with the lowest relative humidity are February and March (64.9%).
Average rainfall in December
Jeju, South Korea
- Average rainfall in December: 47.7mm
The wettest month (with the highest rainfall) is August (262.5mm).
The driest month (with the least rainfall) is December (47.7mm).
Average rainfall days in December
Jeju, South Korea
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is August (13.5 days).
The month with the least rainy days is October (7 days).
Average sea temperature in December
Jeju, South Korea
- Average sea temperature in December: 15.9°C
The best month for swimming (with the highest average sea temperature) is August (26.2°C).
The coldest month (with the lowest average sea temperature) is March (13.3°C).
Average daylight in December /
Average sunshine in December
Jeju, South Korea
- Average daylight in December: 10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in December: 2h and 4min
The month with the most sunshine is May (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average UV index in December
Jeju, South Korea
- Average UV index in December: 3
The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).
Jeju, South Korea
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