Seoul
South Korea
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Seoul, South Korea

The colorful lit cityscape of Seoul city, South Korea, with the perfect view of the Dongdaemun Gate
The colorful lit cityscape of Seoul city, South Korea, with the perfect view of the Dongdaemun Gate
The first month of the winter, December, is also a wintry month in Seoul, South Korea, with average temperature fluctuating between 4.3°C (39.7°F) and -3.2°C (26.2°F).

Temperature

In Seoul, the average high-temperature in December decreases, from a fresh 11.6°C (52.9°F) in November, to a cold 4.3°C (39.7°F). The average low-temperature, in December, is -3.2°C (26.2°F).

Humidity

In December, the average relative humidity is 60.6%.

Rainfall

In Seoul, South Korea, in December, during 7.4 rainfall days, 21.5mm (0.85") of precipitation is typically accumulated. Throughout the year, in Seoul, there are 108.8 rainfall days, and 1450.6mm (57.11") of precipitation is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.6h of daylight.

Sunshine

In December, the average sunshine in Seoul is 4.9h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in December in Seoul?

In December, the average high-temperature is 4.3°C (39.7°F), and the average low-temperature is -3.2°C (26.2°F).

What is the average humidity in December in Seoul?

In December, the average relative humidity in Seoul, South Korea, is 60.6%.

How many days does it rain in December in Seoul?

In December, in Seoul, the rain falls for 7.4 days. Throughout December, 21.5mm (0.85") of precipitation is accumulated.

What is the month with the shortest days in Seoul?

With an average of 9.6h of daylight, December has the shortest days of the year in Seoul, South Korea.

How many hours of daylight does Seoul have in December?

The average length of the day in December in Seoul is 9.6h.

How many hours of sunshine does Seoul have in December?

In Seoul, South Korea, the average sunshine in December is 4.9h.

What are the months with the lowest UV index in Seoul?

Months with the lowest UV index in Seoul are January and December, with an average maximum UV index of 2.

What is the UV index reading in December in Seoul?

In December, the average daily maximum UV index in Seoul, South Korea, is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in December - Seoul, South Korea
  • Average high temperature in December: 4.3°C

The warmest month (with the highest average high temperature) is August (29.6°C).
The month with the lowest average high temperature is January (1.5°C).

  • Average low temperature in December: -3.2°C

The month with the highest average low temperature is August (22.4°C).
The coldest month (with the lowest average low temperature) is January (-5.9°C).

Average humidity in December - Seoul, South Korea
  • Average humidity in December: 60.6%

The month with the highest relative humidity is July (78.3%).
The month with the lowest relative humidity is April (56.2%).

Average rainfall in December - Seoul, South Korea
  • Average rainfall in December: 21.5mm

The wettest month (with the highest rainfall) is July (394.7mm).
The driest month (with the lowest rainfall) is January (20.8mm).

Average rainfall days in December - Seoul, South Korea
  • Average rainfall days in December: 7.4 days

The month with the highest number of rainy days is July (16.3 days).
The month with the lowest number of rainy days is February (5.8 days).

Average daylight in December / Average sunshine in December - Seoul, South Korea
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 4.9h

The month with most sunshine is May (Average sunshine: 6.9h).
The month with least sunshine is July (Average sunshine: 3.9h).

Average UV index in December - Seoul, South Korea
  • Average UV index in December: 2

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 2).