How Crowded Is Castle Clinton in June?
June is a busy month at Castle Clinton National Monument, running about 1.3× the park's average month — roughly 11% of the year's visitors come in June. That puts it between the July peak and the January low. Overall our best-time score rates June as "Fair" for a visit. Typical June weather averages a high near 80°F and a low around 64°F, with about 4.5" of precipitation. You'll get about 14.9 hours of daylight to explore.
Frequently Asked Questions
June is busy at Castle Clinton National Monument (about 1.3× the average month). Our best-time score rates it "Fair". The single best month overall is September.
The busiest month is July and the quietest is January. June sits at about 1.3× the park's average, or 11% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.