May in Alexandria averages a daily high of 24.3°C with nights around 13.1°C. Expect roughly 13 wet days totalling 128.9mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Alexandria is September–October.
Based on OXON HILL, MD US (4.6km), 1995–2024. 17 years of May data.