December in Paris 09 Opéra averages a daily high of 8.8°C with nights around 2.6°C. Expect roughly 16 wet days totalling 60.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Paris 09 Opéra is May–September.
Based on PARIS MONTSOURIS, FR (5.6km), 1995–2024. 16 years of December data.