December in Aalen averages a daily high of 4°C with nights around -1.5°C. Expect roughly 17.2 wet days totalling 78.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Aalen is May–September.
Based on ELLWANGEN RINDELBACH, GM (17.2km), 1995–2024. 30 years of December data.