July in Plymouth averages a daily high of 20.5°C with nights around 13.2°C. Expect roughly 12.1 wet days totalling 65.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Plymouth is June–September.
Based on PLYMOUTH MOUNTBATTEN, UK (2.5km), 1995–2024. 27 years of July data.