September in Tongshan averages a daily high of 27.5°C with nights around 18.5°C. Expect roughly 6.4 wet days totalling 65.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Tongshan is April–May.
Based on XUZHOU, CH (11.4km), 1995–2024. 23 years of September data.