September in Santiago de Compostela averages a daily high of 23.1°C with nights around 12.2°C. Expect roughly 10 wet days totalling 87.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Santiago de Compostela is June–September.
Based on SANTIAGO DE COMPOSTELA LABACOL, SP (11km), 1995–2024. 30 years of September data.