How Crowded Is Cabrillo in September?
September is an average month at Cabrillo National Monument, running about 0.9× the park's average month — roughly 7% of the year's visitors come in September. It is the quietest month of the year here — the best time to have the place largely to yourself, though you may trade away some warmth and daylight. Typical September weather averages a high near 77°F and a low around 65°F, with about 0.2" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is average at Cabrillo National Monument (about 0.9× the average month). Our best-time score rates it "Excellent". The single best month overall is September.
The busiest month is July and the quietest is September. September sits at about 0.9× the park's average, or 7% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.