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 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: Most people do not enjoy swimming in water that is 15.9°C. Breathing becomes increasingly challenging as the water temperature dips under 21°C.
On the first day of the month, sunrise is at 07:19 and sunset at 17:25. On the last day of December, sunrise is at 07:37 and sunset at 17:35 KST.
Note: The maximum UV index, 3 during December, leads to the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Experience reduced UV exposure by about half when donning a wide-brim hat.
[Resources]Temperature
The arrival of December in Jeju indicates a decrease in the average high-temperature, moving from a refreshing 16°C in November to a fresh 11°C. Throughout the month of December, Jeju reports a steady low-temperature average of 5.3°C.Humidity
In Jeju, the average relative humidity in December is 65.1%.Rainfall
The month with the least rainfall in Jeju is December, when the rain falls for 10.8 days and typically collects 48mm of precipitation.Sea temperature
In December, the average sea temperature is 15.9°C.Note: Most people do not enjoy swimming in water that is 15.9°C. Breathing becomes increasingly challenging as the water temperature dips under 21°C.
Daylight
December has the shortest days of the year, 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, sunrise is at 07:37 and sunset at 17:35 KST.
Sunshine
In December, the average sunshine in Jeju is 2.7h.UV index
The months with the lowest UV index in Jeju, South Korea, are January and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 3 during December, leads to the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Experience reduced UV exposure by about half when donning a wide-brim hat.
FAQ
What is the usual temperature for Jeju in December?
The average high-temperature and low-temperature in Jeju during December are 11°C and 5.3°C respectively. The average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, in August is computed to be 36°C.
What is the average humidity in December in Jeju?
The average relative humidity in December in Jeju, South Korea, is 65.1%.
What is the driest month in Jeju?
December is the month with the least rainfall. Rain falls for 10.8 days and accumulates 48mm of precipitation.
How much does it rain in Jeju in December?
In Jeju, South Korea, in December, during 10.8 rainfall days, 48mm of precipitation is typically accumulated.
What is the sea water temperature in December in Jeju?
In Jeju, South Korea, the average seawater temperature in December is 15.9°C. For swimming, a surface water temperature of 15.9°C 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.
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.
What is the average length of the day in December in Jeju?
The average day length in December in Jeju, South Korea, is 9h and 59min.
When is the sunrise / sunset in December in Jeju?
On the first day of December in Jeju, South Korea, sunrise is at 07:19 and sunset at 17:25. On the last day of the month, sunrise is at 07:37 and sunset at 17:35 KST.
How many hours of sunshine does Jeju have in December?
In Jeju, South Korea, the average sunshine duration in December is 2.7h.
When is the lowest UV index in Jeju?
January and December, with an average maximum UV index of 3, are months with the lowest UV index.
What is the UV index intensity in December in Jeju?
In Jeju, South Korea, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents 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
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
