January in Aveiro averages a daily high of 14.1°C with nights around 6.3°C. Expect roughly 14.6 wet days totalling 151.2mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Aveiro is June–September.
Based on PORTO, PO (54.3km), 1995–2024. 17 years of January data.