August in Manchester averages a daily high of 27.1°C with nights around 14.4°C. Expect roughly 9.6 wet days totalling 91.9mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Manchester is May–September.
Based on MASSABESIC LAKE, NH US (5.1km), 1995–2024. 29 years of August data.