May in Trnava averages a daily high of 21.6°C with nights around 9.1°C. Expect roughly 12.3 wet days totalling 60.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Trnava is April–September.
Based on PIESTANY, LO (32.2km), 1995–2024. 23 years of May data.