December in Syracuse averages a daily high of 3.4°C with nights around -4.1°C. Expect roughly 18.7 wet days totalling 84.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Syracuse is May–September.
Based on SYRACUSE HANCOCK INTERNATIONAL AIRPORT, NY US (7.8km), 1995–2024. 30 years of December data.