In August, Seongnam-si typically sees daytime highs of 29.0°C and overnight lows around 21.2°C. Compared to the annual average high of 16.1°C, August runs +12.9°C.
August in Seongnam-si averages a daytime high of 29.0°C and an overnight low of 21.2°C.
August runs +12.9°C compared to Seongnam-si's annual average high of 16.1°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.0°C and cooler evenings around 21.2°C.