May in Ussuriysk averages a daily high of 19°C with nights around 7.6°C. Expect roughly 12 wet days totalling 72.6mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Ussuriysk is June–September.
Based on TIMIRYAZEVSKIJ, RS (8.8km), 1995–2024. 25 years of May data.