December in Fayetteville averages a daily high of 10.5°C with nights around -0.3°C. Expect roughly 5.8 wet days totalling 74.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Fayetteville is April–May.
Based on FAYETTEVILLE EXPERIMENTAL STATION, AR US (4.5km), 1995–2024. 12 years of December data.