July in Brest averages a daily high of 25.6°C with nights around 14.5°C. Expect roughly 13.3 wet days totalling 92.1mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Brest is May–September.
Based on BREST, BO (2.5km), 1995–2024. 26 years of July data.