May in Centreville averages a daily high of 24°C with nights around 11.7°C. Expect roughly 13 wet days totalling 123.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Centreville is September–October.
Based on WASHINGTON DULLES INTERNATIONAL AIRPORT, VA US (10.6km), 1995–2024. 30 years of May data.