Your holiday weather, at a glance

South Korea in December: where is it warmest?

In December, Jeju is the warmest place with 10 °C by day, Sokcho the coolest with 4 °C. 0 of 9 destinations have good holiday weather.

All destinations in December, warmest first

Long-term averages for the month: daytime high, sea, sunshine and rainy days.

Place	Score	Air	Sea	Sun	Rain days
Jeju	32	10°	17°	3 h	8
Busan	46	9°	17°	7 h	3
Ulsan	41	8°	17°	6 h	3
Gyeongju	40	7°	–	6 h	3
Gwangju	37	7°	–	5 h	4
Daegu	40	6°	–	6 h	3
Daejeon	36	5°	–	5 h	4
Seoul	36	4°	–	5 h	5
Sokcho	28	4°	13°	6 h	5

South Korea in December: where is it warmest?

The warmest places in December are Jeju (10 °C), Busan (9 °C) and Ulsan (8 °C).

South Korea in December: where is the sea warmest?

The sea is warmest at Jeju (17 °C), Busan (17 °C) and Ulsan (17 °C).

South Korea in December: where is the weather best?

The best holiday weather in December – warm, sunny and dry – is in Busan, Ulsan and Gyeongju.

Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences