October in Lancaster averages a daily high of 19.1°C with nights around 7.2°C. Expect roughly 10 wet days totalling 107.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Lancaster is May–June.
Based on LANCASTER 2 NE FILT PLANT, PA US (3km), 1995–2024. 30 years of October data.