September in Longnan averages a daily high of 25.8°C with nights around 17.1°C. Expect roughly 11.6 wet days totalling 67.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Longnan is March–May.
Based on WUDU, CH (0.2km), 1995–2024. 23 years of September data.