How Crowded Is Harpers Ferry National Historical Park in May?

May runs about 1.3× Harpers Ferry National Historical Park's average month, which makes it a busy month here — roughly 11% of the park's yearly visitors come in May.

In a typical May the park sees about 40,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes May the 5th-busiest of the park's twelve months, sitting between the July peak (1.7×) and the January low (0.1×).

On our Best Time to Visit score May rates 52/100 ("Fair"), versus the top-rated September at 57/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical May weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 74°F and an overnight low around 49°F, with about 4.6" of precipitation.

That average of about 61°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 38% of annual visitors, choosing May instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 14.2 hours of daylight in May to explore — between the 9.2-hour midwinter low and the 14.8-hour summer high.

Park-wide, 2025 drew 537,876 recreation visits, up 10.2% from 488,049 in 2024.

Across the past decade overall visitation has risen about 46.8%, so a May visit is likely to feel busier than it did a few years ago.