May in Antioch averages a daily high of 26.2°C with nights around 12.2°C. Rain is rare — about 2.4 wet days and 10.1mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Antioch is April–May.
Based on ANTIOCH PUMPING PLANT NUMBER 3, CA US (5.3km), 1995–2024. 22 years of May data.