December in Erie averages a daily high of 4.3°C with nights around -1.9°C. Expect roughly 18.6 wet days totalling 103.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Erie is May–September.
Based on ERIE INTERNATIONAL AIRPORT, PA US (9.7km), 1995–2024. 30 years of December data.