In September, Hyesan typically sees daytime highs of 19.2°C and overnight lows around 5.4°C. Compared to the annual average high of 9.3°C, September runs +9.9°C.
September in Hyesan averages a daytime high of 19.2°C and an overnight low of 5.4°C.
September runs +9.9°C compared to Hyesan's annual average high of 9.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 19.2°C and cooler evenings around 5.4°C.