In September, Heishan typically sees daytime highs of 24.1°C and overnight lows around 11.5°C. Compared to the annual average high of 14.2°C, September runs +9.9°C.
September in Heishan averages a daytime high of 24.1°C and an overnight low of 11.5°C.
September runs +9.9°C compared to Heishan's annual average high of 14.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 24.1°C and cooler evenings around 11.5°C.