December in Vannes averages a daily high of 11.1°C with nights around 7.2°C. Expect roughly 16.1 wet days totalling 79.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Vannes is June–September.
Based on BELLE ILE LE TALUT, FR (52.9km), 1995–2024. 30 years of December data.