October in Lisbon averages a daily high of 23°C with nights around 15.7°C. Expect roughly 10 wet days totalling 111.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lisbon is May–September.
Based on LISBOA GEOFISICA, PO (0.9km), 1995–2024. 25 years of October data.