December in South Bend averages a daily high of 2.9°C with nights around -4.3°C. Expect roughly 14.8 wet days totalling 62mm. A hard month to visit for comfort alone.
Across the year, the best time to visit South Bend is June–September.
Based on SOUTH BEND AIRPORT, IN US (6.1km), 1995–2024. 30 years of December data.