December in Leesburg averages a daily high of 7.6°C with nights around -2.8°C. Expect roughly 6.3 wet days totalling 78mm. Demanding conditions — pack for it and plan indoor options.
Across the year, the best time to visit Leesburg is April–June.
Based on PURCELLVILLE, VA US (12.9km), 1995–2024. 29 years of December data.