September in Heguan averages a daily high of 27°C with nights around 16.3°C. Expect roughly 6.1 wet days totalling 60.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Heguan is April–May.
Based on WEIFANG, CH (55.9km), 1995–2024. 23 years of September data.