May in Avilés averages a daily high of 17.7°C with nights around 10.5°C. Expect roughly 13.9 wet days totalling 71.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Avilés is June–September.
Based on ASTURIAS AVILES, SP (9.7km), 1995–2024. 30 years of May data.