Weather in South Korea for December 2025

December in South Korea marks the onset of winter, bringing a distinct chill across the country. At the beginning of December, temperatures in Seoul typically hover around 3° during the day, dropping to around -4° at night.

The capital city often experiences clear skies, though the air can be quite dry. As the month progresses, the cold intensifies, with temperatures in Seoul dipping further, sometimes reaching lows of -7° by the end of December.

In the southern regions, such as Busan, the weather is slightly milder. Early December sees daytime temperatures around 10°, with nighttime temperatures around 3°. By the end of December, Busan experiences cooler days with temperatures around 7°, and nights can be as cold as 0°.

Despite the chill, the coastal city often enjoys more sunshine compared to the northern parts.

Jeju Island, known for its unique climate, experiences a milder winter. In early December, temperatures range from 8° to 13°, while by the end of the month, they drop to between 5° and 10°. Snow is rare on the island, making it a unique winter destination.

Overall, December in South Korea is characterized by cold, dry weather, with varying conditions depending on the region. Travelers should prepare for chilly temperatures, especially in the northern areas.

Have you visited South Korea in December? Share your experience by writing a review.