September in Heihe averages a daily high of 19.5°C with nights around 7.9°C. Expect roughly 9.3 wet days totalling 58.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Heihe is May–June.
Based on BLAGOVESCENSK, RS (1km), 1995–2024. 30 years of September data.