Jeju
South Korea
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Jeju, South Korea

A high sunrise Panorama of the Jeju Island in Jeju, South Korea
A high sunrise Panorama of the Jeju Island in Jeju, South Korea
December, the first month of the winter, in Jeju, is still a cool month, with average temperature fluctuating between 11°C (51.8°F) and 5.3°C (41.5°F).

Temperature

In Jeju, the average high-temperature in December decreases, from a comfortable 16°C (60.8°F) in November, to a fresh 11°C (51.8°F). In December, the average low-temperature is 5.3°C (41.5°F).

Humidity

The average relative humidity in December is 65.1%.

Rainfall

December is the month with the least rainfall in Jeju. Rain falls for 10.8 days and accumulates 47.7mm (1.9") of precipitation.

Sea temperature

In Jeju, in December, the average water temperature is 15.9°C (60.6°F).
Note: 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).

Daylight

December has the shortest days of the year in Jeju, South Korea, with an average of 10h of daylight.

Sunshine

The average sunshine in Jeju is 2.7h.

UV index

Months with the lowest UV index in Jeju are January and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in December in Jeju?

The average high-temperature, in December, is 11°C (51.8°F), while the average low-temperature is 5.3°C (41.5°F).

What is the average humidity in December in Jeju?

In Jeju, South Korea, the average relative humidity in December is 65.1%.

How much does it rain in Jeju in December?

In December, in Jeju, the rain falls for 10.8 days. Throughout December, 47.7mm (1.9") of precipitation is accumulated.

What is the driest month in Jeju?

December is the month with the least rainfall in Jeju, South Korea. Rain falls for 10.8 days and accumulates 47.7mm (1.9") of precipitation.

What is the sea temperature 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?

December has the shortest days of the year in Jeju, with an average of 10h of daylight.

What is the average length of the day in December in Jeju?

In December, the average length of the day in Jeju is 10h.

How many hours of sunshine does Jeju have in December?

The average sunshine in December 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.

What is the UV index reading in December in Jeju?

In Jeju, South Korea, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's 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%).
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 lowest 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 lowest number of 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

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in December: 2.7h

The month with most sunshine is May (Average sunshine: 6.8h).
The month with least sunshine is January (Average sunshine: 2.3h).

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).
Months with the lowest UV index are January and December (UV index 3).