August in Plymouth averages a daily high of 26.8°C with nights around 16.3°C. Expect roughly 9.6 wet days totalling 112.2mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Plymouth is May–September.
Based on NEW HOPE, MN US (6km), 1995–2024. 30 years of August data.