April in National City averages a daily high of 20.4°C with nights around 12°C. Expect roughly 3.4 wet days totalling 16.5mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit National City is April–November.
Based on CHULA VISTA, CA US (4.4km), 1995–2024. 23 years of April data.