April in Downtown DC averages a daily high of 19.9°C with nights around 7.4°C. Expect roughly 11.3 wet days totalling 87.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Downtown DC is April–May.
Based on NATIONAL ARBORETUM DC, MD US (4.8km), 1995–2024. 29 years of April data.