How Crowded Is Tumacácori National Historical Park in August?

August runs about 0.4× Tumacácori National Historical Park's average month, which makes it a very quiet month here — roughly 3% of the park's yearly visitors come in August.

In a typical August the park sees roughly 1,100 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

It is the quietest month of the year at Tumacácori; by contrast December, the busiest, runs about 2.2× the average — so August is the easiest time to have the place largely to yourself.

On our Best Time to Visit score August rates 78/100 ("Excellent") — the single best-rated month at Tumacácori, 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 66°F, with about 3.4" of precipitation.

That average of about 79°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 9% of the year's visitors, so a visit this month means sharing the park with the peak-season crowd.

You'll have about 13.2 hours of daylight in August to explore — between the 10-hour midwinter low and the 14-hour summer high.

Park-wide, 2024 drew 35,256 recreation visits, down 6.9% from 37,872 in 2023.

Across the past decade overall visitation has eased about 20.6%, so August may feel a touch quieter than it once did.