How Crowded Is Tumacácori in May?
May is a quiet month at Tumacácori National Historical Park, running about 0.8× the park's average month — roughly 7% of the year's visitors come in May. That puts it between the December peak and the August low. Overall our best-time score rates May as "Excellent" for a visit. Typical May weather averages a high near 86°F and a low around 49°F, with about 0.2" of precipitation. You'll get about 13.6 hours of daylight to explore.
Frequently Asked Questions
May is quiet at Tumacácori National Historical Park (about 0.8× the average month). Our best-time score rates it "Excellent". The single best month overall is August.
The busiest month is December and the quietest is August. May sits at about 0.8× the park's average, or 7% of annual visitation.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-06-20.