December in Cary averages a daily high of 12.7°C with nights around 2°C. Expect roughly 7.3 wet days totalling 101.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Cary is April–May.
Based on RALEIGH STATE UNIVERSITY, NC US (7.4km), 1995–2024. 30 years of December data.