How Crowded Is Coronado in September?
September is an average month at Coronado National Memorial, running about 1.0× the park's average month — roughly 8% of the year's visitors come in September. That puts it between the March peak and the June low. Overall our best-time score rates September as "Excellent" for a visit. Typical September weather averages a high near 84°F and a low around 58°F, with about 2.1" of precipitation. You'll get about 12.2 hours of daylight to explore.
Frequently Asked Questions
September is average at Coronado National Memorial (about 1.0× the average month). Our best-time score rates it "Excellent". The single best month overall is June.
The busiest month is March and the quietest is June. September sits at about 1.0× the park's average, or 8% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.