August in Hietzing averages a daily high of 26.8°C with nights around 16.2°C. Expect roughly 10.1 wet days totalling 73.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Hietzing is May–September.
Based on WIEN, AU (6.5km), 1995–2024. 30 years of August data.