September in Ulan-Ude averages a daily high of 17°C with nights around 4.5°C. Expect roughly 7.7 wet days totalling 22.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ulan-Ude is May–August.
Based on ULAN UDE, RS (0.7km), 1995–2024. 24 years of September data.