May in Gilroy averages a daily high of 25.6°C with nights around 10.1°C. Rain is rare — about 2.3 wet days and 11.9mm across the month. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Gilroy is April–June.
Based on GILROY, CA US (0.7km), 1995–2024. 23 years of May data.