In December, Seoul typically sees daytime highs of 3.0°C and overnight lows around -5.7°C. Compared to the annual average high of 16.1°C, December runs -13.1°C.
December in Seoul averages a daytime high of 3.0°C and an overnight low of -5.7°C.
December runs -13.1°C compared to Seoul's annual average high of 16.1°C, ranking #11 of 12 months by warmth.
Plan for daytime highs near 3.0°C and cooler evenings around -5.7°C.