December in Jackson averages a daily high of 8.6°C with nights around -1.8°C. Expect roughly 9.2 wet days totalling 120mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Jackson is April–May.
Based on INDIAN MILLS 2 W, NJ US (7.4km), 1995–2024. 28 years of December data.