How Crowded Is Manhattan Project in August?
August is a busy month at Manhattan Project National Historical Park, running about 1.4× the park's average month — roughly 11% of the year's visitors come in August. That puts it between the July peak and the January low. Overall our best-time score rates August as "Fair" for a visit. Typical August weather averages a high near 80°F and a low around 55°F, with about 3.2" of precipitation. You'll get about 13.4 hours of daylight to explore.
Frequently Asked Questions
August is busy at Manhattan Project National Historical Park (about 1.4× the average month). Our best-time score rates it "Fair". The single best month overall is May.
The busiest month is July and the quietest is January. August sits at about 1.4× the park's average, or 11% of annual visitation.
Source: National Park Service Visitor Use Statistics (2016–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.