In September, Yantongshan typically sees daytime highs of 20.6°C and overnight lows around 7.7°C. Compared to the annual average high of 10.2°C, September runs +10.3°C.
September in Yantongshan averages a daytime high of 20.6°C and an overnight low of 7.7°C.
September runs +10.3°C compared to Yantongshan's annual average high of 10.2°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 20.6°C and cooler evenings around 7.7°C.