September in Leesburg averages a daily high of 25.9°C with nights around 13°C. Expect roughly 6.7 wet days totalling 121.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Leesburg is April–June.
Based on PURCELLVILLE, VA US (12.9km), 1995–2024. 29 years of September data.