April in Washington averages a daily high of 19.8°C with nights around 8.9°C. Expect roughly 10.7 wet days totalling 83.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Washington is April–May.
Based on WASHINGTON REAGAN NATIONAL AIRPORT, VA US (5.3km), 1995–2024. 30 years of April data.