How Crowded Is Grand Canyon National Park in May?

May runs about 1.2× Grand Canyon National Park's average month, which makes it a busy month here — roughly 10% of the park's yearly visitors come in May.

In a typical May the park sees about 552,000 recreation visits, based on National Park Service monthly counts from 1979 to 2025.

That makes May the 4th-busiest of the park's twelve months, sitting between the July peak (1.5×) and the January low (0.4×).

On our Best Time to Visit score May rates 48/100 ("Fair"), versus the top-rated June at 57/100 — best overall balance of crowds, weather and daylight.

Typical May weather, from 1991–2020 NOAA climate normals at the nearest station, averages a daytime high near 70°F and an overnight low around 36°F, with about 0.4" of precipitation.

That average of about 53°F is a comfortable range for hiking and being outdoors all day.

Because June, July and August together draw about 35% of annual visitors, choosing May instead steps outside that summer crush — the single biggest lever on how crowded the park feels.

You'll have about 13.9 hours of daylight in May to explore — between the 9.6-hour midwinter low and the 14.4-hour summer high.

Park-wide, 2025 drew 4,430,653 recreation visits, down 9.9% from 4,919,163 in 2024.

Across the past decade overall visitation has eased about 22.4%, so May may feel a touch quieter than it once did.