How Crowded Is Monocacy National Battlefield in September?

September runs about 1.1× Monocacy National Battlefield's average month, which makes it an average month here — roughly 9% of the park's yearly visitors come in September.

In a typical September the park sees about 11,000 recreation visits, based on National Park Service monthly counts from 1991 to 2025.

That makes September the 6th-busiest of the park's twelve months, sitting between the July peak (1.5×) and the January low (0.5×).

On our Best Time to Visit score September rates 60/100 ("Good"), versus the top-rated April at 56/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical September weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 80°F and an overnight low around 59°F, with about 5.8" of precipitation.

That average of about 70°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 33% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 12.2 hours of daylight in September to explore — between the 9.2-hour midwinter low and the 14.8-hour summer high.

Park-wide, 2025 drew 116,902 recreation visits, about flat from 116,520 in 2024.

Across the past decade overall visitation has risen about 7.4%, so a September visit is likely to feel busier than it did a few years ago.