Casa Grande Ruins National Monument in May
May at Casa Grande Ruins National Monument averages a daytime high near 95°F and an overnight low around 59°F, with about 0.2" of precipitation. Visitation runs about 0.7× the park's average month, which makes May a quiet month here.
- Average low
- 59°F
- Average high
- 95°F
Range across the year: 36°F to 107°F
- Precipitation
- 0.2 in
- Daylight
- 13.7 hours
Roughly 6% of the park's yearly visitors come in May: roughly 4,500 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes May the 8th-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 May rates 55/100 ("Fair"). Our recommended month is December: the lightest crowds of the park's good-weather months.
The daily average of about 77°F is hot, with afternoons near 95°F to plan the day around. These figures are 1991–2020 NOAA climate normals from the nearest station, about 0.3 miles from the park.
Because June, July and August together draw about 12% 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 13.7 hours of daylight in May to explore — between the 9.8-hour midwinter low and the 14.2-hour summer high.
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 May visit is likely to feel busier than it did a few years ago.
How May compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| April | 86°F / 51°F | 1.1× Average | 73 Good |
| May | 95°F / 59°F | 0.7× Quiet | 55 Fair |
| June | 105°F / 68°F | 0.5× Quiet | 49 Fair |
All twelve months at Casa Grande Ruins, with the best time to visit.
Frequently Asked Questions
May averages a daytime high near 95°F and an overnight low around 59°F at Casa Grande Ruins National Monument, with about 0.2 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 0.3 miles from the park, so conditions inside the park can differ, especially at other elevations.
May is quiet at Casa Grande Ruins National Monument (about 0.7× the average month). Our best-time score rates it "Fair" at 55/100. Our recommended month is December.
The busiest month is March and the quietest is August. May sits at about 0.7× the park's average, or 6% of annual visitation.
A typical May sees about 4,000 recreation visits at Casa Grande Ruins National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Casa Grande Ruins in May
Booking a May trip to Casa Grande Ruins National Monument? Compare hotels, cabins and vacation rentals near the park with live May availability and prices.
Top-rated places to stay near Casa Grande Ruins
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See the full ranking of the best national parks to visit in May.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.