January in Rueil-Malmaison averages a daily high of 7.8°C with nights around 1.4°C. Expect roughly 15.4 wet days totalling 44.6mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Rueil-Malmaison is May–September.
Based on PARIS MONTSOURIS, FR (12.4km), 1995–2024. 19 years of January data.