September in Brockton averages a daily high of 24.4°C with nights around 12.2°C. Expect roughly 9.3 wet days totalling 107.8mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Brockton is May–June.
Based on BROCKTON, MA US (4.1km), 1995–2024. 30 years of September data.