In December, Seosan typically sees daytime highs of 5.1°C and overnight lows around -2.3°C. Compared to the annual average high of 15.5°C, December runs -10.4°C.
December in Seosan averages a daytime high of 5.1°C and an overnight low of -2.3°C.
December runs -10.4°C compared to Seosan's annual average high of 15.5°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 5.1°C and cooler evenings around -2.3°C.