In April, Seongnam-si typically sees daytime highs of 16.9°C and overnight lows around 4.9°C. Compared to the annual average high of 16.1°C, April runs +0.8°C.
April in Seongnam-si averages a daytime high of 16.9°C and an overnight low of 4.9°C.
April runs +0.8°C compared to Seongnam-si's annual average high of 16.1°C, ranking #7 of 12 months by warmth.
Plan for daytime highs near 16.9°C and cooler evenings around 4.9°C.