May in Lviv averages a daily high of 20°C with nights around 8.5°C. Expect roughly 12.5 wet days totalling 80.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lviv is May–September.
Based on LVIV, UP (5.8km), 1995–2024. 16 years of May data.