July in Lancaster averages a daily high of 30.3°C with nights around 18.6°C. Expect roughly 10.6 wet days totalling 112.5mm. Generally workable, with some weather to plan around.
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 July data.