How Crowded Is Castle Clinton National Monument in April?

April runs about 1× Castle Clinton National Monument's average month, which makes it an average month here — roughly 9% of the park's yearly visitors come in April.

In a typical April the park sees about 343,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes April the 6th-busiest of the park's twelve months, sitting between the July peak (1.6×) and the January low (0.5×).

On our Best Time to Visit score April rates 52/100 ("Fair"), versus the top-rated September at 67/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical April weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 62°F and an overnight low around 46°F, with about 4.1" of precipitation.

That average of about 54°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 37% of annual visitors, choosing April instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 13.1 hours of daylight in April to explore — between the 9.1-hour midwinter low and the 14.9-hour summer high.

Park-wide, 2025 drew 3,656,350 recreation visits, down 4.4% from 3,822,759 in 2024.

Across the past decade overall visitation has eased about 28.2%, so April may feel a touch quieter than it once did.