May in Vladivostok averages a daily high of 15°C with nights around 7.2°C. Expect roughly 13.9 wet days totalling 97.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Vladivostok is September.
Based on VLADIVOSTOK, RS (5km), 1995–2024. 29 years of May data.