October in Philadelphia averages a daily high of 20°C with nights around 11.2°C. Expect roughly 8.4 wet days totalling 101.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Philadelphia is September–October.
Based on PHILADELPHIA FRANKLIN INSTITUTE, PA US (1km), 1995–2024. 28 years of October data.