October in Ellicott City averages a daily high of 20.2°C with nights around 8.5°C. Expect roughly 8.5 wet days totalling 100.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Ellicott City is April–May.
Based on BALTIMORE WASHINGTON INTERNATIONAL AIRPORT, MD US (14.4km), 1995–2024. 30 years of October data.