May in Watsonville averages a daily high of 20.5°C with nights around 9.6°C. Expect roughly 3.3 wet days totalling 13.7mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Watsonville is May–October.
Based on WATSONVILLE WATERWORKS, CA US (2.5km), 1995–2024. 29 years of May data.