December in Youngstown averages a daily high of 3.8°C with nights around -3.3°C. Expect roughly 17.8 wet days totalling 80.3mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Youngstown is May–September.
Based on YOUNGSTOWN WARREN REGIONAL AIRPORT, OH US (17.3km), 1995–2024. 30 years of December data.