September in Kunshan averages a daily high of 28.3°C with nights around 22.5°C. Expect roughly 8.4 wet days totalling 94.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Kunshan is September–November.
Based on SHANGHAI, CH (48.7km), 1995–2024. 23 years of September data.