In January, Seongnam-si typically sees daytime highs of 0.3°C and overnight lows around -9.2°C. Compared to the annual average high of 16.1°C, January runs -15.8°C.
January in Seongnam-si averages a daytime high of 0.3°C and an overnight low of -9.2°C.
January runs -15.8°C compared to Seongnam-si's annual average high of 16.1°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 0.3°C and cooler evenings around -9.2°C.