How Crowded Is Antietam National Battlefield in July?

July runs about 2× Antietam National Battlefield's average month, which makes it a very busy month here — roughly 17% of the park's yearly visitors come in July.

In a typical July the park sees about 39,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

It is the single busiest month of the year at Antietam; January, the quietest, runs only about 0.2× the average — a 9-to-1 swing between high and low season.

On our Best Time to Visit score July rates 44/100 ("Poor"), versus the top-rated September at 62/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical July weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 86°F and an overnight low around 62°F, with about 4.3" of precipitation.

That average of about 74°F is a comfortable range for hiking and being outdoors all day.

July falls inside the park's busiest stretch: June, July and August together pull about 39% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.

You'll have about 14.5 hours of daylight in July to explore — between the 9.2-hour midwinter low and the 14.8-hour summer high.

Park-wide, 2024 drew 197,340 recreation visits, up 28.5% from 153,560 in 2023.

Across the past decade overall visitation has eased about 60.5%, so July may feel a touch quieter than it once did.