July in Germantown averages a daily high of 29.1°C with nights around 18.5°C. Expect roughly 10.1 wet days totalling 113.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Germantown is August–October.
Based on DAMASCUS 3 SSW, MD US (10.8km), 1995–2024. 30 years of July data.