March in Westminster averages a daily high of 21.8°C with nights around 10.5°C. Expect roughly 5.6 wet days totalling 36.3mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Westminster is April–June.
Based on FULLERTON MUNICIPAL AIRPORT, CA US (12.7km), 1995–2024. 26 years of March data.