How Crowded Is Casa Grande Ruins National Monument in December?

December runs about 1× Casa Grande Ruins National Monument's average month, which makes it an average month here — roughly 8% of the park's yearly visitors come in December.

In a typical December the park sees roughly 6,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes December the 6th-busiest of the park's twelve months, sitting between the March peak (2.2×) and the August low (0.4×).

On our Best Time to Visit score December rates 56/100 ("Fair"), versus the top-rated May at 78/100 — pleasant weather with noticeably thinner crowds (shoulder season).

Typical December weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 67°F and an overnight low around 36°F, with about 0.8" of precipitation.

That average of about 52°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 12% of annual visitors, choosing December instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 9.8 hours of daylight in December to explore — near the year-round minimum.

Park-wide, 2024 drew 104,429 recreation visits, down 6.3% from 111,392 in 2023.

Across the past decade overall visitation has risen about 17.5%, so a December visit is likely to feel busier than it did a few years ago.