December in Newark averages a daily high of 7.2°C with nights around -0.3°C. Expect roughly 10.9 wet days totalling 120.2mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Newark is May–June.
Based on HARRISON, NJ US (2.2km), 1995–2024. 27 years of December data.