December in Hietzing averages a daily high of 4.3°C with nights around -0.2°C. Expect roughly 11.6 wet days totalling 46.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Hietzing is May–September.
Based on WIEN, AU (6.5km), 1995–2024. 30 years of December data.