December in Arad averages a daily high of 4.9°C with nights around -1.4°C. Expect roughly 11.2 wet days totalling 46.1mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Arad is April–June.
Based on ARAD, RO (6.1km), 1995–2024. 30 years of December data.