December in Lyon averages a daily high of 7.5°C with nights around 1.8°C. Expect roughly 12.6 wet days totalling 65.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Lyon is May–September.
Based on LYON ST EXUPERY, FR (18km), 1995–2024. 30 years of December data.