May in Gijón averages a daily high of 18.1°C with nights around 12.4°C. Expect roughly 12.9 wet days totalling 59.7mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Gijón is June–September.
Based on GIJON MUSEL, SP (4.1km), 1995–2024. 27 years of May data.