September in Avilés averages a daily high of 21.4°C with nights around 14°C. Expect roughly 10 wet days totalling 67mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Avilés is June–September.
Based on ASTURIAS AVILES, SP (9.7km), 1995–2024. 29 years of September data.