December in Brockton averages a daily high of 6.9°C with nights around -3.2°C. Expect roughly 12.2 wet days totalling 120.9mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Brockton is May–June.
Based on BROCKTON, MA US (4.1km), 1995–2024. 29 years of December data.