March in Gilroy averages a daily high of 20.4°C with nights around 6.6°C. Expect roughly 7.7 wet days totalling 59.8mm. 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. 25 years of March data.