September in Longjiang averages a daily high of 21.6°C with nights around 10°C. Expect roughly 6.5 wet days totalling 35.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Longjiang is August–September.
Based on QIQIHAR, CH (54.6km), 1995–2024. 23 years of September data.