December in South Vineland averages a daily high of 8.5°C with nights around -2.1°C. Expect roughly 10.5 wet days totalling 102.6mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit South Vineland is May–June.
Based on MILLVILLE MUNICIPAL AIRPORT, NJ US (9.8km), 1995–2024. 30 years of December data.