How Crowded Is Petroglyph National Monument in August?

August runs about 0.8× Petroglyph National Monument's average month, which makes it a quiet month here — roughly 6% of the park's yearly visitors come in August.

In a typical August the park sees about 18,000 recreation visits, based on National Park Service monthly counts from 1992 to 2025.

It is the quietest month of the year at Petroglyph; by contrast October, the busiest, runs about 1.4× the average — so August is the easiest time to have the place largely to yourself.

On our Best Time to Visit score August rates 83/100 ("Excellent") — the single best-rated month at Petroglyph, balancing crowds against weather and daylight.

Typical August weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 91°F and an overnight low around 63°F, with about 1.6" of precipitation.

That average of about 77°F is warm enough that midday heat is worth planning around.

August falls inside the park's busiest stretch: June, July and August together pull about 21% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.

You'll have about 13.3 hours of daylight in August to explore — between the 9.6-hour midwinter low and the 14.4-hour summer high.

Park-wide, 2025 drew 310,672 recreation visits, down 12.4% from 354,534 in 2024.

Across the past decade overall visitation has risen about 42%, so a August visit is likely to feel busier than it did a few years ago.