April in Brentwood averages a daily high of 22.5°C with nights around 9.5°C. Expect roughly 3.6 wet days totalling 20.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Brentwood is April–May.
Based on ANTIOCH PUMPING PLANT NUMBER 3, CA US (7.6km), 1995–2024. 23 years of April data.