September in Lviv averages a daily high of 18.6°C with nights around 8.3°C. Expect roughly 10.5 wet days totalling 64.7mm. 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 September data.