September in Sishui averages a daily high of 27.6°C with nights around 16.4°C. Expect roughly 6.6 wet days totalling 72.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Sishui is April–May.
Based on YANZHOU, CH (39.6km), 1995–2024. 29 years of September data.