December weather forecast
Seoul, South Korea

December marks the advent of winter, with temperatures diving into chilly lows. The streets are adorned with warm festive decorations, lighting up Seoul's winter spell. Hot street food serves as the city’s defense against the falling mercury. Vicinities turn to a winter wonderland as snow starts covering the ground, with the lower temperature averaging at -3.2°C (26.2°F). With approaching January, the winter intensifies, and temperatures continue to drop further.

Temperature

Transition into December in Seoul, South Korea, marks a drop in the average high-temperature, moving from a fresh 11.6°C (52.9°F) in November to a wintry 4.3°C (39.7°F). In December, in Seoul, the average low-temperature is a subzero cold -3.2°C (26.2°F).

Humidity

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

Rainfall

In December, the rain falls for 7.4 days. Throughout December, 22mm (0.87") of precipitation is accumulated. In Seoul, South Korea, during the entire year, the rain falls for 108.8 days and collects up to 1451mm (57.13") of precipitation.

Daylight

December has the shortest days of the year, with an average of 9h and 36min of daylight.
On the first day of the month, sunrise is at 07:28 and sunset at 17:14. On the last day of December, in Seoul, sunrise is at 07:46 and sunset at 17:23 KST.

Sunshine

In Seoul, the average sunshine in December 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 hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, the maximum UV index of 2 suggests these recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Minimize direct exposure to the Sun during midday when its radiation is at its peak. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.