May in Villach averages a daily high of 18.3°C with nights around 5.6°C. Expect roughly 14.7 wet days totalling 131.2mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Villach is June–September.
Based on RATECE PLANICA, SI (17.1km), 1995–2024. 29 years of May data.