January in Hernals averages a daily high of 3.6°C with nights around -1.3°C. Expect roughly 12.6 wet days totalling 44.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Hernals is May–September.
Based on WIEN, AU (3.2km), 1995–2024. 30 years of January data.