December in Parma averages a daily high of 4.5°C with nights around -2.3°C. Expect roughly 15.6 wet days totalling 75.8mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Parma is May–September.
Based on CLEVELAND HOPKINS INTERNATIONAL AIRPORT, OH US (11.5km), 1995–2024. 30 years of December data.