December in Viareggio averages a daily high of 12.6°C. Expect roughly 11.8 wet days totalling 97.4mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Viareggio is April–July.
Based on PISA, IT (23.3km), 1995–2024. 12 years of December data.