January in Antioch averages a daily high of 13.7°C with nights around 4.7°C. Expect roughly 11.5 wet days totalling 79.5mm. Generally workable, with some weather to plan around.
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 January data.