October in Tumen averages a daily high of 15.3°C with nights around 1.1°C. Expect roughly 6.3 wet days totalling 27.8mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Tumen is May.
Based on YANJI, CH (29.9km), 1995–2024. 24 years of October data.