In September, Sewon typically sees daytime highs of 30.6°C and overnight lows around 22.3°C. Compared to the annual average high of 30.9°C, September runs -0.3°C.
September in Sewon averages a daytime high of 30.6°C and an overnight low of 22.3°C.
September runs -0.3°C compared to Sewon's annual average high of 30.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 30.6°C and cooler evenings around 22.3°C.