July in Columbia averages a daily high of 31.4°C with nights around 20.1°C. Expect roughly 10.6 wet days totalling 118.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Columbia is April–May.
Based on BALTIMORE WASHINGTON INTERNATIONAL AIRPORT, MD US (15.3km), 1995–2024. 30 years of July data.