How Crowded Is Organ Pipe Cactus in December?
December is an average month at Organ Pipe Cactus National Monument, running about 1.0× the park's average month — roughly 8% of the year's visitors come in December. That puts it between the March peak and the July low. Overall our best-time score rates December as "Fair" for a visit. Typical December weather averages a high near 70°F and a low around 41°F, with about 1.1" of precipitation. You'll get about 9.9 hours of daylight to explore.
Frequently Asked Questions
December is average at Organ Pipe Cactus National Monument (about 1.0× the average month). Our best-time score rates it "Fair". The single best month overall is May.
The busiest month is March and the quietest is July. December sits at about 1.0× the park's average, or 8% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.