December in Fall River averages a daily high of 6.9°C with nights around -2.6°C. Expect roughly 12.3 wet days totalling 105.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Fall River is May–September.
Based on NEW BEDFORD MUNICIPAL AIRPORT, MA US (16.5km), 1995–2024. 29 years of December data.