October in Washington averages a daily high of 20.8°C with nights around 11.3°C. Expect roughly 8.2 wet days totalling 93.2mm. 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 October data.